Stegosaurus

A stegosaurus. It shouldn't need support. It does need to be scaled up a bit... 7+ cm should be good. I also added paws to help the front feet stick down better.

Fun fact: the spikes on a stegosaurus's tail is called the 'thagomizer', a term originally from cartoonist Gary Larson.

https://en.wikipedia.org/wiki/Thagomizer

Recently I widened the spikes on its back so they would print better.