diff --git a/src/pocketmine/item/Armor.php b/src/pocketmine/item/Armor.php
index f625e7cea..b368837f5 100644
--- a/src/pocketmine/item/Armor.php
+++ b/src/pocketmine/item/Armor.php
@@ -27,5 +27,7 @@ use pocketmine\entity\Entity;
 
 abstract class Armor extends Item{
 
-	public $maxStackSize = 1;
+    public function getMaxStackSize(){
+        return 1;
+    }
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/Bed.php b/src/pocketmine/item/Bed.php
index e4abebc1b..9ad66d2f2 100644
--- a/src/pocketmine/item/Bed.php
+++ b/src/pocketmine/item/Bed.php
@@ -27,6 +27,9 @@ class Bed extends Item{
 	public function __construct($meta = 0, $count = 1){
 		$this->block = Block::get(Item::BED_BLOCK);
 		parent::__construct(self::BED, 0, $count, "Bed");
-		$this->maxStackSize = 1;
 	}
+
+    public function getMaxStackSize(){
+        return 1;
+    }
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/BeetrootSoup.php b/src/pocketmine/item/BeetrootSoup.php
index 323ec397e..217b76e09 100644
--- a/src/pocketmine/item/BeetrootSoup.php
+++ b/src/pocketmine/item/BeetrootSoup.php
@@ -25,7 +25,9 @@ namespace pocketmine\item;
 class BeetrootSoup extends Item{
 	public function __construct($meta = 0, $count = 1){
 		parent::__construct(self::BEETROOT_SOUP, 0, $count, "Beetroot Soup");
-		$this->maxStackSize = 1;
 	}
 
+    public function getMaxStackSize(){
+        return 1;
+    }
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/Bucket.php b/src/pocketmine/item/Bucket.php
index 04863381c..855bf713b 100644
--- a/src/pocketmine/item/Bucket.php
+++ b/src/pocketmine/item/Bucket.php
@@ -31,10 +31,16 @@ use pocketmine\Player;
 class Bucket extends Item{
 	public function __construct($meta = 0, $count = 1){
 		parent::__construct(self::BUCKET, $meta, $count, "Bucket");
-		$this->isActivable = true;
-		$this->maxStackSize = 1;
 	}
 
+    public function getMaxStackSize(){
+        return 1;
+    }
+
+    public function canBeActivated(){
+        return true;
+    }
+
 	public function onActivate(Level $level, Player $player, Block $block, Block $target, $face, $fx, $fy, $fz){
 		$targetBlock = Block::get($this->meta);
 
diff --git a/src/pocketmine/item/Cake.php b/src/pocketmine/item/Cake.php
index dc0710d97..3001c137b 100644
--- a/src/pocketmine/item/Cake.php
+++ b/src/pocketmine/item/Cake.php
@@ -26,7 +26,10 @@ use pocketmine\block\Block;
 class Cake extends Item{
 	public function __construct($meta = 0, $count = 1){
 		$this->block = Block::get(Item::CAKE_BLOCK);
-		$this->maxStackSize = 1;
 		parent::__construct(self::CAKE, 0, $count, "Cake");
 	}
+
+    public function getMaxStackSize(){
+        return 1;
+    }
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/FlintSteel.php b/src/pocketmine/item/FlintSteel.php
index 731bb7174..94f9a18a7 100644
--- a/src/pocketmine/item/FlintSteel.php
+++ b/src/pocketmine/item/FlintSteel.php
@@ -30,9 +30,12 @@ use pocketmine\Player;
 class FlintSteel extends Tool{
 	public function __construct($meta = 0, $count = 1){
 		parent::__construct(self::FLINT_STEEL, $meta, $count, "Flint and Steel");
-		$this->isActivable = true;
 	}
 
+    public function canBeActivated(){
+        return true;
+    }
+
 	public function onActivate(Level $level, Player $player, Block $block, Block $target, $face, $fx, $fy, $fz){
 		if(($player->gamemode & 0x01) === 0 and $this->useOn($block) and $this->getDamage() >= $this->getMaxDurability()){
 			$player->getInventory()->setItemInHand(new Item(Item::AIR, 0, 0));
diff --git a/src/pocketmine/item/IronDoor.php b/src/pocketmine/item/IronDoor.php
index 5cf28b3f8..32a3f21f1 100644
--- a/src/pocketmine/item/IronDoor.php
+++ b/src/pocketmine/item/IronDoor.php
@@ -27,6 +27,9 @@ class IronDoor extends Item{
 	public function __construct($meta = 0, $count = 1){
 		$this->block = Block::get(Item::IRON_DOOR_BLOCK);
 		parent::__construct(self::IRON_DOOR, 0, $count, "Iron Door");
-		$this->maxStackSize = 1;
 	}
+
+    public function getMaxStackSize(){
+        return 1;
+    }
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/Item.php b/src/pocketmine/item/Item.php
index 4304cf30f..fee49f924 100644
--- a/src/pocketmine/item/Item.php
+++ b/src/pocketmine/item/Item.php
@@ -373,7 +373,7 @@ class Item{
 	const CARROT = 391;
 	const CARROTS = 391;
 	const POTATO = 392;
-	const POTATOES = 392; //@shoghicp Why the heck do we need plural redundant Item ID here????
+	const POTATOES = 392;
 	const BAKED_POTATO = 393;
 	const BAKED_POTATOES = 393;
 
@@ -396,10 +396,12 @@ class Item{
 	protected $id;
 	protected $meta;
 	public $count;
-	protected $maxStackSize = 64;
 	protected $durability = 0;
 	protected $name;
-	public $isActivable = false;
+
+    public function canBeActivated(){
+        return false;
+    }
 
 	public static function init(){
 		if(self::$list === null){
@@ -425,6 +427,7 @@ class Item{
 			self::$list[self::SPAWN_EGG] = SpawnEgg::class;
 			self::$list[self::DIAMOND] = Diamond::class;
 			self::$list[self::STICK] = Stick::class;
+            self::$list[self::SNOWBALL] = Snowball::class;
 			self::$list[self::BOWL] = Bowl::class;
 			self::$list[self::FEATHER] = Feather::class;
 			self::$list[self::BRICK] = Brick::class;
@@ -514,16 +517,16 @@ class Item{
 			if(!isset($b[1])){
 				$meta = 0;
 			}else{
-				$meta = ((int) $b[1]) & 0xFFFF;
+				$meta = $b[1] & 0xFFFF;
 			}
 
 			if(defined(Item::class . "::" . strtoupper($b[0]))){
 				$item = self::get(constant(Item::class . "::" . strtoupper($b[0])), $meta);
 				if($item->getId() === self::AIR and strtoupper($b[0]) !== "AIR"){
-					$item = self::get(((int) $b[0]) & 0xFFFF, $meta);
+					$item = self::get($b[0] & 0xFFFF, $meta);
 				}
 			}else{
-				$item = self::get(((int) $b[0]) & 0xFFFF, $meta);
+				$item = self::get($b[0] & 0xFFFF, $meta);
 			}
 
 			return $item;
@@ -539,9 +542,6 @@ class Item{
 			$this->block = Block::get($this->id, $this->meta);
 			$this->name = $this->block->getName();
 		}
-		if($this->isTool() !== false){
-			$this->maxStackSize = 1;
-		}
 	}
 
 
@@ -581,8 +581,8 @@ class Item{
 		$this->meta = $meta !== null ? $meta & 0xFFFF : null;
 	}
 
-	final public function getMaxStackSize(){
-		return $this->maxStackSize;
+	public function getMaxStackSize(){
+		return 64;
 	}
 
 	final public function getFuelTime(){
diff --git a/src/pocketmine/item/ItemBlock.php b/src/pocketmine/item/ItemBlock.php
index 7734961be..fcbc18ea5 100644
--- a/src/pocketmine/item/ItemBlock.php
+++ b/src/pocketmine/item/ItemBlock.php
@@ -28,7 +28,7 @@ use pocketmine\block\Block;
  */
 class ItemBlock extends Item{
 	public function __construct(Block $block, $meta = 0, $count = 1){
-		$this->block = clone $block;
+		$this->block = $block;
 		parent::__construct($block->getId(), $block->getDamage(), $count, $block->getName());
 	}
 
diff --git a/src/pocketmine/item/MushroomStew.php b/src/pocketmine/item/MushroomStew.php
index 61a9b610a..96813a44a 100644
--- a/src/pocketmine/item/MushroomStew.php
+++ b/src/pocketmine/item/MushroomStew.php
@@ -25,7 +25,9 @@ namespace pocketmine\item;
 class MushroomStew extends Item{
 	public function __construct($meta = 0, $count = 1){
 		parent::__construct(self::MUSHROOM_STEW, 0, $count, "Mushroom Stew");
-		$this->maxStackSize = 1;
 	}
 
+    public function getMaxStackSize(){
+        return 1;
+    }
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/Painting.php b/src/pocketmine/item/Painting.php
index 5ab5ac95d..21325adb9 100644
--- a/src/pocketmine/item/Painting.php
+++ b/src/pocketmine/item/Painting.php
@@ -29,9 +29,12 @@ use pocketmine\Player;
 class Painting extends Item{
 	public function __construct($meta = 0, $count = 1){
 		parent::__construct(self::PAINTING, 0, $count, "Painting");
-		$this->isActivable = true;
 	}
 
+    public function canBeActivated(){
+        return true;
+    }
+
 	public function onActivate(Level $level, Player $player, Block $block, Block $target, $face, $fx, $fy, $fz){
 		if($target->isTransparent() === false and $face > 1 and $block->isSolid() === false){
 			$faces = [
diff --git a/src/pocketmine/item/Sign.php b/src/pocketmine/item/Sign.php
index ed06c6a16..5c3cd393c 100644
--- a/src/pocketmine/item/Sign.php
+++ b/src/pocketmine/item/Sign.php
@@ -26,7 +26,10 @@ use pocketmine\block\Block;
 class Sign extends Item{
 	public function __construct($meta = 0, $count = 1){
 		$this->block = Block::get(Item::SIGN_POST);
-		$this->maxStackSize = 16;
 		parent::__construct(self::SIGN, 0, $count, "Sign");
 	}
+
+    public function getMaxStackSize(){
+        return 16;
+    }
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/Snowball.php b/src/pocketmine/item/Snowball.php
new file mode 100644
index 000000000..4c5ff7986
--- /dev/null
+++ b/src/pocketmine/item/Snowball.php
@@ -0,0 +1,34 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____  
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \ 
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/ 
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_| 
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ * 
+ *
+*/
+
+namespace pocketmine\item;
+
+
+class Snowball extends Item{
+	public function __construct($meta = 0, $count = 1){
+		parent::__construct(self::SNOWBALL, 0, $count, "Snowball");
+	}
+
+    public function getMaxStackSize(){
+        return 16;
+    }
+
+}
\ No newline at end of file
diff --git a/src/pocketmine/item/SpawnEgg.php b/src/pocketmine/item/SpawnEgg.php
index 6b472cba0..622be0580 100644
--- a/src/pocketmine/item/SpawnEgg.php
+++ b/src/pocketmine/item/SpawnEgg.php
@@ -33,11 +33,13 @@ use pocketmine\Player;
 
 class SpawnEgg extends Item{
 	public function __construct($meta = 0, $count = 1){
-		parent::__construct(self::SPAWN_EGG, 0, $count, "Spawn Egg");
-		$this->meta = $meta;
-		$this->isActivable = true;
+		parent::__construct(self::SPAWN_EGG, $meta, $count, "Spawn Egg");
 	}
 
+    public function canBeActivated(){
+        return true;
+    }
+
 	public function onActivate(Level $level, Player $player, Block $block, Block $target, $face, $fx, $fy, $fz){
 		$entity = null;
 		$chunk = $level->getChunk($block->getX() >> 4, $block->getZ() >> 4);
diff --git a/src/pocketmine/item/Tool.php b/src/pocketmine/item/Tool.php
index c6c08131d..140cc2c38 100644
--- a/src/pocketmine/item/Tool.php
+++ b/src/pocketmine/item/Tool.php
@@ -34,9 +34,12 @@ abstract class Tool extends Item{
 
 	public function __construct($id, $meta = 0, $count = 1, $name = "Unknown"){
 		parent::__construct($id, $meta, $count, $name);
-		$this->maxStackSize = 1;
 	}
 
+    public function getMaxStackSize(){
+        return 1;
+    }
+
 	/**
 	 * TODO: Move this to each item
 	 *
diff --git a/src/pocketmine/item/WoodenDoor.php b/src/pocketmine/item/WoodenDoor.php
index 251ba68bc..678d8328f 100644
--- a/src/pocketmine/item/WoodenDoor.php
+++ b/src/pocketmine/item/WoodenDoor.php
@@ -27,6 +27,9 @@ class WoodenDoor extends Item{
 	public function __construct($meta = 0, $count = 1){
 		$this->block = Block::get(Item::WOODEN_DOOR_BLOCK);
 		parent::__construct(self::WOODEN_DOOR, 0, $count, "Wooden Door");
-		$this->maxStackSize = 1;
 	}
+
+    public function getMaxStackSize(){
+        return 1;
+    }
 }
\ No newline at end of file
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index 45e56ad9f..dad6c164c 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -1266,11 +1266,11 @@ class Level implements ChunkManager, Metadatable{
 			$this->server->getPluginManager()->callEvent($ev);
 			if(!$ev->isCancelled()){
 				$target->onUpdate(self::BLOCK_UPDATE_TOUCH);
-				if($target->isActivable === true and $target->onActivate($item, $player) === true){
+				if($target->canBeActivated() === true and $target->onActivate($item, $player) === true){
 					return true;
 				}
 
-				if($item->isActivable and $item->onActivate($this, $player, $block, $target, $face, $fx, $fy, $fz)){
+				if($item->canBeActivated() and $item->onActivate($this, $player, $block, $target, $face, $fx, $fy, $fz)){
 					if($item->getCount() <= 0){
 						$item = Item::get(Item::AIR, 0, 0);
 
@@ -1278,7 +1278,7 @@ class Level implements ChunkManager, Metadatable{
 					}
 				}
 			}
-		}elseif($target->isActivable === true and $target->onActivate($item, $player) === true){
+		}elseif($target->canBeActivated() === true and $target->onActivate($item, $player) === true){
 			return true;
 		}