The Stegasaurus lived around 156- 140 million years ago and is known for the plates embedded along its back and it's small head. This 3D puzzle version has 49 perferated pieces to be popped out of the sheets provided to build a Stegasaurus with backdrop. Model Size: 35.4cm x 17.5cm x 18.4cm. Age: 8+ years. Small parts, not for children under 3 yrs.