Boost Thunder the T-Rex by merging him with the non-electronic Race Car to create a Powerful Dragon for 2-in-1 play in just a few simple steps Hear Thunder talk about his teeth, claws and jaws or fiery phrases and exciting sounds from the Powerful Dragon that add to the imaginative play This Powerful Dragon is ready to fly; press the button to flap its wings Build a Switch & Go world with even more transforming creature vehicles (each sold separately) Intended for ages 4+ years; requires 1 AA battery; battery included for demo purposes only; new battery recommended for regular use Hear the rumble with Thunder the T-Rex and a super-fast Race Car. Play with each one separately or get boosted by merging the dynamic duo to create a Powerful Dragon in a few simple steps. Soar through the skies with exciting sound effects, phrases and lights. Let's fly! Move the dragon's arms to gnash his sharp teeth and press the button to flap his powerful wings. Build a Switch & Go world with more transforming creature vehicles (each sold separately). Intended for ages 4+ years. Requires 1 AAA battery. Battery included for demo purposes only. New battery recommended for regular use.