I bought this kit for my five year old son. Surprisingly, the included items are of a pretty good quality. I was a bit surprised that some needed ingredients were not included and had to be provided by the user, but I guess it is OK. For example, we do not use corn starch at home, so one experiment has to wait until I bought corn starch. It would be nice if the creators of the kit either provided some cornstarch or recommended an alternative, but it is not a big deal for me. Ingredients you need to supply on your own are marked on each experiment card with a little house icon. We are still going through the experiments, but my son loves doing them and is looking forward to using the kit every day. He liked testing with included litmus papers vinegar, milk, and lime juice, and then recording his observations and conclusions in the note book. Certain experiments did not work very well - for example, sticky ice did not work, potentially because in CA it is too warm for the water melted by salt to refreeze. Yeast-generated gas didn't inflating the balloon. We could feel some gas inside the balloon, but it did not rise as shown on the experiment card. Chromatography of color markers didn't work at all. Glue slime came out as cottage cheese. Volcano eruption worked, but I had to double all ingredients. Still, with several tries and help of internet you can make most experiments work. To me the kit is still worth it because of provided supplies and tools. In my view, the kit works on many different levels. It teaches children chemistry, organizing workplace, safety (wearing goggles), accuracy (measuring), motor skills (using pipette, etc.), observing the results and drawing conclusion, reading (instruction cards), and writing (notebook). I would recommend this kit to others, just expect you will have to re-try certain experiments. Alternatively, you can look up simple experiments online.