How to make a Bouncy Ball. Fun project with the kids, but it really didn't work very well. They're not like store bought bouncy balls!
Science for Kids: Overnight Crystal Garden - Babble Dabble Do (uses epsom salts) Lots of great science experiments
You can make giant, stretchy, REUSABLE bubbles that had our entire family giggling for hours! Made from the galaxy slime!
Summer Activities for Kids -- the ultimate list of summer boredom busters! (DIY, Home Decor, Crafts, Farmhouse)
Awesome list of science projects kids can make and eat too. Great list for summer for Preschool, Kindergarten, grade, grade, and grade elementary students. Sounds like a fun cooking class idea
Building Instructions - Frugal Fun For Boys How to Build LEGO Cats - Building Instructions Should you appreciate arts and crafts a person will love this cool website!
Might be worth buying lego wheels so the year can make something similar, based on their own design. 15 fun and easy LEGO science activities for kids