Here is a cute unicorn that your kids can put together and program with Blockly. The UnicornBot Kit from UBTECH comes with 440 snap-together parts. It has 360-degree animated building instructions. Users can not only change the color of the horn but get to create new actions with pose, record, and play.
The app works with iOS and Android devices. The kit consists of a DC motor, light up unicorn horn, servo motors, and everything you need to get this cute unicorn moving.