Kids - Magic Science Kit
There are seven activities in the box. Most have to do with density, acids and bases. A lot of color changing and fizzy experiments. Basic contents in the box: baking soda, citric acid, vegetable oil, red cabbage juice powder, zinc sulfide, 4 test tubes, a test tube stand, scooper's for measuring, and a few other random items for the experiments.
None of the experiments are overally messy and there are none on an explosive level, like Mentos and Coke-a-Cola. It's a very good learning tool for me and for my kiddos. The lowest cost I found online is at Target for $17.99.