These dolphins are fun to blow through with your mouth, but they work POORLY in the water.  They work better when the water has been drained out of them before placing them in their innertubes in the water.  But seeing as they are water toys, it doesn't make much sense to do! My boys were 2 and 5 when we got them as a gift.  They are now 4 and 7 and still don't like them. I just gave them to Goodwill.