There's this packet that I purchased last year that you are supposed to add to your child's bath and it makes it this fun texture. Then you add the second packet and it turns it back to water. Well, I had read some reviews that it clogged the bathtub. So I decided we would try it outside. Apparently I didn't get to it last summer. Isaac was really into, Nolan was a little more hesitant. Over all a fun activity, but wouldn't buy it again.