(Snap Circuits $25.95) Our toy tester really enjoyed working with this 58 piece set that gives you the instructions for building 10+ models with the light up brick pieces. While you're having fun putting together your build, you're also learning about circuits. "I love that it comes with wheels" -- our tester built a small vehicle powered by a 9 volt battery (not included). Unlike a lot of STEM toys, this is not overwhelming. Marked 8 & up -- a good parent child kit to explor