Bests & Worsts Reviews from Amazon

I bought this to use with my 7 year old son, and I had high hopes for this item based on other reviews and the price, however: -The litmus paper for acid/base experiment do not work -The recipe for the "soda" is not drinkable, in the least -Powders for rock candy were supposed to be colored, but were not -Materials are flimsy -The booklet is merely instructions, no teaching of the "science" involved. I haven't finished trying the other experiments and I am not sure I will. You could look these "experiments" up yourself and do a much better job of rounding up the materials and educational information, with less stress and better results.