CollectA ConcavenatorCollectA Concavenator CollectA Model 88515 Product Dimensions: 14. 5 x 3 x 6 cm Age: 3 years and up The Concavenator was a dinosaur that stood out in a crowd, thanks to the two odd humps on its back, right in front of its hips. These weren't just for showthey might have been used to help regulate its body temperature, or they could have been a sign to other dinosaurs that this was a particularly impressive individual. Living around 130 million years