Here’s a nice simple design for building mini tanks! They’re cool, and they’re very easy to build thanks to the interlocking turret design. Multiple turrets can be quickly cut from a strip of foam with only minimal cuts.

Mini Tanks!   Mini Turrets!

I came up with this design when my son and I were trying to invent a tank game. The beauty of this option is it looks much better than just flat pictures, but is not that much harder to make.

Nice hex grid paper via