A "toy" has been released called "Tama Cafe Cooking! Kururin Shake Maker". However, this is more of a kitchen item than something to play with. It was released April 2010 for 3,300 Yen.
Now you can make your own delicious shakes with your Tamagotchi friends! It's super-easy and fun, too--just put fruit and vanilla ice cream into the mixer, turn the handle, and soon you'll have a delicious, healthy shake! A manual is included, in Japanese (with illustrations), and a recipe book too. No batteries needed! For ages 6 and up.