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 This easy-to-transform T-Rex and Race Car toy is great for preschoolers; makes an exciting unisex gift for holidays, birthdays or just because!