It's an egg! It's a cat! It's one of the cutest things you've ever seen! Yurakoro Tamago Nyanko (loosely translated as Rock'n Roll Egg Kitties) are little egg-shaped cats that cry out when you rock them around and meow happily when you hold them. 

This cutie here is Grey Tora, a.k.a. Grey Tiger. He's a playful little tabby looking for a new home—won't you give him one?

See Grey Tiger in action!