Very messy.. but so much fun!
I purchased two of these science kits. One for my 9 year old boy and another for my 7 year old boy. The kit was actually larger than I thought it would be. The test tubes are perfect for small (and sometimes clumsy) hands. There are over 60 science related activities to try. Some are very simple.. such as the tiny pellets that you put into water and they grow into larger gooeyish type balls. You can also create your own instant snow, a 60' soda geyser (haven't tried this one yet), as well as testing out sunscreens to see if will block harmful rays. There are too many activities to list.. and be warned that some of the activities are rather messy. The kids have had a blast.. and sometimes a mess is worth it!
If you are trying to find a kit for your child that they will enjoy.. as well as learn with, I would recommend this set. The bag is even reusable to put all of the equipment back in. It was a pleasant surprise!