Building toy includes 1 Jammy Stackers T-Rex and 15 big building blocks, designed to be durable Stack the blocks on the T-Rex's head or roll the T-Rex to hear 7 different adorable sounds of the toddler mimicking the dinosaur, with an additional 8th sound when left idle Place the blocks inside the T-Rex's belly for easy storage Blocks are compatible with all Jammy Stackers playsets and MEGA BLOKS building sets for endless learning fun Ideal for ages 1+, and endorsed by Fisher-Price, First Builders blocks are the perfect fit for little hands, designed to develop gross and fine motor skills ​ You and your little one can discover 8 adorable sounds when you play with the Jammy Stackers T-Rex and 15 big building blocks. Start by turning the T-Rex on with the on/off switch. Then, your toddler can get to building when they stack blocks directly on the T-Rex's head to hear cute sounds, or push it to hear more adorable sounds as it rolls. An additional 8th sound will play when the T-Rex is left idle. When playtime is over, the blocks can be stored inside the T-Rex for easy cleanup.Ideal for First Builders, ages 1+