33 Easy Science Experiments for Kids That Only Require Household Materials
Science, and the scientific method, are just ways of describing what is happening in the world around us. So while a kid who is interested in the subject might have fun with STEM toys and science kits, you don't actually need to go out and buy something special to keep the STEM learning going at home. You probably have most of the materials you need to do these science experiments for kids sitting around in cupboards and drawers. So, next time you need a bordeom-busting indoor activity on a rainy day or a DIY project to keep them busy, pull out one of these ideas and get them to start making hypotheses.
These kid-friendly experiments cover magnetism, surface tension, astronomy, chemistry, magnetism — you name it — and in ways that lets kids really see how the forces around us work. As always, safety counts: wear goggles and coats or aprons if need be (sometimes kids get a kick out of how scientific the protective gear makes them look), and always make sure that the kids are supervised when doing them. These are mostly designed for preschoolers through elementary schoolers, but if you have a younger one, you can check out these 1-year-old learning activities, toddler learning activities and preschool/kindergarten learning activities, some of which also cover STEM subjects.
Apple Oxidation

What works best for keeping an apple from turning brown? Test to find out! Slice up an apple, and let each slice soak in a different liquid. Then take them out, lay them on a tray, and check the brownness after three minutes, six minutes and so on. Not only does this test the properties of different liquids, it also helps students practice the scientific method if they create hypotheses about which liquids would be most effective. Read More...