Your children make things at home all the time. They should like this small tutorial on how to make a DIY electric generator. Check this out

In this tutorial, you can learn and practice how to make a proximity sensor for less than 30 dollars in 30 minutes at home with an Arduino

In this quick STEM tutorial dedicated to young kids, learn how to make a cheap barometer at home in less than 20 minutes. Take a look at it!

Learn how to make a rain gauge in 30 minutes at home with your kids. It's a easy kid science experiment they can do with a bottle of water.