Say hello to the Stegosaurus thagomizer—the four fearsome tail spikes that made predators think twice! About 150 million years ago, in the Late Jurassic period, Stegosaurus roamed what is now North America, peacefully munching plants… until something got too close. Then, with a swing of its muscular tail, this gentle giant could deliver a blow strong enough to break bones.

The term “thagomizer” started as a joke in a cartoon, but paleontologists loved it so much that it became the official name for these famous spikes. Each spike could grow over 2 feet long, and when combined with the Stegosaurus’ size and power, they formed one of the most intimidating defensive weapons in the dinosaur kingdom. Our kit captures this legendary tail tip in all its prehistoric glory!