DIY Kids: https://diy.org/
PBS Design Squad: http://pbskids.org/designsquad/
3D Design: https://www.tinkercad.com/
Architectural Builder: https://edu.sketchup.com/app/
Caine's Arcade Cardboard Challenge: http://cainesarcade.com/
PBS Building Big: http://www.pbs.org/wgbh/buildingbig/