This is an extremely disappointing product. All the child gets is a small ball-bearing guide to the digestive system, that frustrated then bored both my children, and a small booklet about the digestive system that didn't grab either of their attentions for much more than a minute either. Both items are loosely placed inside an oddly large box – there is a huge mis-match between the size of the box and what is inside the box. I bought this on extreme special and still feel ripped-off. It may be worth a few dollars, if that, but I cannot recommend buying this for curious or science-loving kids – they were as disappointed as I was.