How to use: First, take the Optimus Prime figure. To convert it from robot to T - Rex mode, just perform the simple one - step transformation. Do the same for Scale the Shield - Bot, changing it from Ankylosaurus to shield mode. In robot mode, you can make Optimus Prime hold Scale in shield mode. Press the button on Optimus Prime's back to see the chomping action. Have fun playing with different scenarios. Note: These toys are for kids 3 and up. Keep small parts away from younger children to avoid choking hazards. Maintenance: If the toys get dirty, use a soft, dry cloth to wipe them. Avoid using harsh chemicals as they may damage the figures. Store the toys in a cool, dry place when not in use to keep them in good condition.