I was really hoping these would work because I thought how great would these be to have in the car or in my purse so when the kids forgot to brush their teeth I could just hand them one of theses. For camping like it suggests it would be easier to just bring your toothpaste. I made my drops and then let them sit twice as long as suggested and mine never hardened. They stayed sticky and like toothpaste. So I was a little disappointed but I am sure at some point the kids will remember to always brush their teeth, maybe when they are 20??