Here are my most favorite experiments I've found for a three to four-year-old.
Science experiment filtering water - WOW Journey More
Fun experiments aren’t just for the little ones-- 15 fun activities for older kids.
Lemon volcanoes, crystal rainbows, and color clouds -- these fun and easy DIY science experiments will wow the whole family.
Cool Science Experiments for 5-6 Year Olds. Fun STEM learning activities that kids can do at home.
Simple Physics Activities Science Experiments STEM Ideas for Kids
Homeschool Science Experiments from Astronomy to Zoology and everything in between: Force and Motion, Chemistry, Nature Study, Science Equipment, Holiday/Season science themes and more.
15 Science Experiments that Pop Fizz and Crackle
Easy Science Experiment for Kids. Growing Crystals. Great Spring or Easter science experiment.