Great Fun for 7 and 4 year old
Yes, the price is a bit much considering what comes in the box - that's why 4 rather than 5 stars. However, I don't know that I've ever come across guar gum or valerian root powder in my routine shopping or otherwise. So you pay a few extra bucks for convenience - big deal. The kids have an absolute blast and they are loving learning about science with hands on experiments. Bacteria, molds, snot, gag, digestion, blood - what's not to love? We've completed all but two of the experiments and they've all been easy with results as described. We're waiting for our cultures (snot, dog slobber, toilet rim stuff, and a little girl mouth swap) to grow out so we'll have to wait and see on that one. Unlike one of the other reviewers, our prep of the gelatin for the petri dishes went beautifully. Plus, there are enough supplies to do all of the experiments more than once if you are willing to rinse out the balloon and a few other easy things. We all highly recommend.