Type of Site:
Science, Chemistry, Physics, Biology, Homeschooling
6+ (with an adult)
Weird Science Kids is actually a science program that works with schools to provide hands-on science exploration. Their website lists more than 100 science experiments you can do in a classroom or at home, many of them with materials you'll have around the house. There are environmental explorations, such as "Ecosystem in a Bottle," and explosive experiments, such as "Mentos Geyser." From messy to loud to amazing, there is something for everyone.
The experiments range in difficulty and danger and should be done with adult supervision. Also, if you will be using these for science enrichment, you'll probably need to do a little research first. The experiments come with scientific explanations, but they are not very detailed.