Here’s an ‘art’ project that will appeal to both boys and girls, uses recycled materials, and requires imaginative, somewhat ‘out of the box’ thinking. All good stuff.
You supply the ‘junk’ and let them figure out how to make their robots. This would be a good activity for a playdate, even a party craft activity, as they’ll take ideas from each other and tweak them into new shapes and additions to their constructions.
Save up those paper tubes and boxes for your space or star wars party and they can all build their own C-3PO’s and R2D2’s.