Wish the color was deeper on the teeth but still GREAT!
My 6 yr old daughter LOVES them.  They don't really dye the teeth a very dark color like back in the day but it gives her an idea of where she missed. It really dyes the tongue which she finds hilarious.  We do it at night just before she goes to bed - after she brushes the next morning there's just a hint of purple on her tongue. We don't use them everyday because I want them to last a while.  If she had her choice it would be morning and night.
Rating: 4 stars