These egg-like objects are designed so that two people can sense each other’s presence and movements even when physically separated.
Each member of the relationship has a egg-like object, and when he/she touches it, the egg will swing, and that movement will be sended through internet to the partner egg, and will do the same movement, like if both would be the same egg.
Check the official site.
I searched and this product is not in the market yet. Still, it's a great idea and I guess that will cause new products like this one to be invent. Anyway, If you know how to get one of this ones please tell how in the comments!