The littleBits Avengers Hero Inventor Kit teaches kids valuable STEM skills in an engaging way, but it's a little pricey. You want to teach your kids about the wonderful world of circuits and electricity, but working with raw wires and boards is a pain in the butt, even for adults. It requires proper understanding of the difference between positive and negative charges, and sometimes you need to solder (a dangerous proposition for young children). Easy enough for kids, but advanced enough for their parents to enjoy, the littleBits system uses a series of magnetically snappable bits that let you combine a battery, input sensors and output parts (lights, motors and sensors) into a working project.

The littleBits Avengers Hero Inventor Kit lets kids build a working super-powered gauntlet that you can program to react lights, vibrations or button presses. The hardware and associated mobile app are Marvel-themed with challenges that involve popular heroes such as Iron Man, the Hulk, Black Panther and Shuri. At $149, the Avengers Hero Inventor Kit doesn't come cheap, but it's a compelling STEM-learning tool for elementary school children.