This experiment taught about acids and bases. My son went around the kitchen and bathroom selecting different liquids to test.
The first few experiments featured were from Scientific Explorer's Mind Blowing Science Kit for Young Scientists by Scientific Explorer ($19.99). I purchased this locally at Tutoring Toy.
The last experiment, the magnets, was from this set, Young Scientist Series - Set 1: Recycling (Kit 1) - Scientific Measurements (Kit 2) - Magnets (Kit 3). A big THANK YOU to Discover This for sending it for us to review!
Either of these or the many more out there would make a fun, entertaining, and educational Christmas present for the 4 and up set! There are a whole bunch of science kits out there just waiting to be "discovered." And who knows, you just might spark of love of science in your child!