Hatchimals are mechanical toys that combine video-game play mechanics with a physical bird or dinosaur. The novelty is that they arrive in a sealed plastic egg and then hatch themselves before you start playing.
They have been very popular and hard to buy in stores. In this video there’s a test of the toy with a real family along with some advice on where to find your Hatchimals before Christmas.
It also goes through each of the different stages of the interactive game: baby, kid and toddler.