This robust manipulative is excellent to give students a quick blast of 3D geometry. The other manipulative that I use in classrooms is Zome. The advantages of Zome are that it is more flexible. It is a tool that can be used by serious mathematicians. The advantages of Space Chips are that it is much less fragile, takes about a fifth the time to disassemble after class, and requires less supervision. With Zome students need to be supervised otherwise their creations can get dendritic and flimsy.
Space Chips
Game and Puzzle Party, Manipulatives