Funny thing, but somewhat impractical

The tortoise looks funny and brought a smile even in adults in the face.
Because the plastic is glued inside, inflating the first time was not so easy (with the mouth one does not need to begin). When it's done, you have this funny turtle with reduced payload in the pond.

Impractical, however, is the omission: You have to press the valve so that the air goes out, and thereby fold the turtle. But that is not so easy, because the air always evaporates in the front legs, instead of the valve.
Thus it is some time employed (for two) to get the thing flat.