This is a "forklift" attachment for an Ozobot. It should fit securely over an Ozobot with a skin. The forklift allows the Ozobot to push and/or guide objects to a destination. It will also allow you to complete construction activities available on the Ozobot Education website.
Update: I redesigned the forklift to fit easier about the Ozobot. The previous design was too tight. Young children often had problems attaching the forklift to the Ozobot. The new design is more flexible and grips the Ozobot with a protective skin. I also reduced the dimensions, which should improve printing times.
Update: I added a simple box which can be used with the Ozobot Construction challenge activities.