I was disappointed with this product because it required a lot of other items not included in the kit. In addition, it did not give a list of required items any where in the book. My children would be working along and the instructions would say use half a lemon (or some other item you do not always have around the house). We do not store lemons at the house so they would have to stop or skip that activity. The book was well designed, had nice colored pictures and was set up in a step by step format. With the exception of the activities that require additional resource, everything but one activity worked well. It includes one activity that we could not make work and when we tried calling the manufacturer no one there could help us. I did order it from Timberdoodle and they were great about resolving my frustration. I would whole heartily recommend purchasing from Timberdoodle but I would not purchase this product.
It required a lot of other items... 
