The classic Soma cube in Minecraft form. Use the pieces and attempt to make a cube (there are 240 ways to do it), or try and make other shapes like the ones here www.fam-bundgaard.dk/SOMA/SOMA1/SOMAFIG1.HTM

The gray set is a guide showing how to fold the advanced pieces, you don't need to print that one unless you want to (Blue = mountain fold; red = valley fold). Also note that 7 (emerald) has two parts.