I got these as individual little gel pens. I didn't know until I looked them up later that the kids are supposed to be able to write on the tub walls with them. Let me just say, that is not going to happen. It's gel. It oozes. It's not going to write on the walls and stay. Not even a little bit, so if that is why you want these, skip it. Get the crayons instead. BUT, if you want a fun, easy way to convince your littles to wash themselves, this is exactly what you want.
My boys do not like to clean themselves. Not at all, not even a little bit. They fight and scream and.. it's not pretty. When I got these, I thought it would be a waste, but they were cheap so why not give it a try? My boys love them! I got one in each of their favorite colors. After they get in the water, I give them their "pens". My youngest "draws" on his arms and legs. My oldest "draws" on his stomach. Then they splash around in the tub, rub the gel to make bubbles and laugh and laugh.
Is it the best cleaner out there? Not by a long shot. Is it effective for young children just learning to wash their own bodies? Absolutely. I'm ordering more to put into their stockings this Christmas! These would be cute for a crayon birthday party favors too or even to stick in Easter baskets. Sweet!