Using this K'Nex K'Nexosaurus Building Set is a breeze. First, take out the 255 high - quality parts and refer to the easy - to - follow instructions you can download. Start assembling the pieces by clicking the rods, connectors, and wheels together to build your dinosaur model. Once you finish building one model, if you want to try the other design, simply take the first one apart. To make your dinosaur move, attach the battery - powered motor. Remember to insert two AA batteries before using the motor. When your kids are done playing, store the pieces in a safe place, like a box, to avoid losing them. Keep the set away from small children who might swallow the parts. Also, make sure to clean the parts regularly with a dry cloth to keep them in good condition. Enjoy hours of creative and educational play with this amazing set!