Using this 2 - In - 1 Transformers Optimus Prime toy is a breeze. First, you can play with it in semi - truck mode by simply pushing it around on the floor. To transform it into robot mode, follow the easy - to - understand assembly steps. Use the included drill and bit to take the toy apart and put it back together as many times as you like. For safety, make sure young kids play under adult supervision, especially when using the drill. Keep the toy away from water to prevent damage. If the drill's power runs out, replace the 2 AA batteries. And when you're done playing, store the toy in a dry place to keep all the parts in good condition.