Magnetic building set. You can make skeletons of prehistoric animals from it. I know two types (maybe some more exist), in one there are more pieces (here is a saber-toothed tiger, 23 details). There are some others with few details, for example, our pterodoctile consists of 7. Mega Bloks also has another Magna Saurs series, also with skeletons .
I think they also have a mammoth… We also bought a saber-toothed predator. The son is happy. Mega blocks had a series of similar ssets before – a knight, a pirate, and a few more magnetic warriors.