To use this set, simply take out the 5 core ressha from the package. Connect them together according to the shapes and connectors to form the 10.2 - inch ToQ Oh. If you have other robots from the Robo Universe line, you can mix and match them to create new combos. When playing, be gentle with the parts to avoid breakage. Keep the set away from small children who might put the parts in their mouths. After playing, store the robots in a dry and safe place to prevent damage. You can also dust them off occasionally to keep them looking new.