Drop it in water and wait for the hatch. This alien egg slowly cracks open over a day or two to reveal a squishy little alien inside — which then keeps growing for days. Simple, strange and completely captivating for kids.

• Hatches in water — first cracks usually show within 12–24 hours
• The alien keeps growing for up to 72 hours in fresh water
• Shrinks back down when dried, so you can hatch the fun again
• A brilliant little science-meets-surprise toy for ages 3+

Sold as 1 piece. Colours and alien designs vary — you'll get a surprise. Not edible; adult supervision recommended.