21 LEGO Challenges for Kids of All Ages | Before I became a mom, I didn't appreciate just how much you can do with LEGO outside of building houses and cars. The internet is FULL of ideas for kids in preschool, kindergarten, elementary school, middle school, and even high school! Whether you're looking for something simple to build at home with your kids, or you're on the hunt for LEGO stem challenges and activities for the classroom, this post has lots of free ideas to inspire you!