What we did in Mr.Powells class was we spit into groups and he gave each group a diaper and we were supposed to get all of the little crystals out of it.Then we would put all the crystals we could get and put it into a plastic bag and then we put a little bit of water in the bag.Then when both of the groups were done we look at the bags and the other groups bag was more thick and my groups bag was more clear and pure.