disgusting!!
We swiped some toes (after running around sockless in rubber boots), toilet water, teeth, the kitchen sink, and left one open to the air for 1/2 an hour. The winner was the toes! Truly gross. It takes about 10 days to get some good cultures going, but we kept a chart and it was VERY educational. The other 'experiments' were just play, but the swabs and cultures in the petri dishes were really worth the money. And there was anough gelatin left to do more experments so we passed the kit on to friends. :)

Fun for all
This toy keeps kids occupied for hours. What did doesn't like to learn about gross things. Depending on the age they will need a little adult supervision.

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.

Gross Science Kit
This was a gift for my 10 year old son. Boys are always into gross things, that's part of my reason for buying. We haven't made any fake snot yet, but I'm sure it will be loads of fun!! It's a fun way to get children into science!!

Great fun, great teaching opportunities, but little in box
This is a fun and convenient kit containing some gelatin, sugar, yeast, a balloon, four petri dishes, a magnifying glass, and some red and green food coloring. Also a few pages, perhaps 6, of projects/instructions.
The kids and I are having fun with this, but then I am in education and was a bio major. So that helps.
For this to be really worth it, it would be nice if it came with a few more projects, or perhaps an actual book for the kids to read.