Growing eggs sea animals - Eduplay

What is enclosing here?
... The big surprise which animal encloses out of the egg? You have to cap the egg with water. Between two days the egg will break and the animal in its size will be shown. Motif depending on stock.

Material: synthetic material
Measurements: egg Ø 5.5 x 7 cm, fish Ø 9.5 x 4.5 x 3.5 cm, dino Ø 8 x 4.5 x 4.5 cm
Age restriction: 3 years
WARNING: Not suitable for children under 36 months due to small parts which may be swallowed, choking hazard!