Rusty Rivets – Botasaur Buildable Figure with Lights and Sounds. Press the button on the back of his head and his eyes will light up and flash as he makes Botasaur sounds! With an expressive face and voice of his own, kids can interact with their newfound sidekick! Give your child the chance to design, build and create, just like their hero, with the Rusty Rivets Botasaur! For Ages 3+. Requires 3 LR44 Batteries (included).