Sticky Piston

The Sticky Piston is a block coming to 1.7 It will be crafted by putting a Slime Ball on top of a Piston in a workbench.

Sticky pistons, as their name suggests, "stick" to an object they push, and will pull the block in front of the paddle section back when they contract. For more information on piston function, see Piston.

Crafting
Crafting recipe of the Sticky Piston, as it was mentioned.