This model, made of 5 interconnected 3D pyramids, was one of the first to be uploaded to Thingiverse. It is a prime example of print-in-place technique, and it is now available in a simplified, optimised form that is very easy to print.
WARNING
It's easy to print the model with the provided print profile but it will take patience, 15 minutes, and a couple of pliers to remove the tree support
The peaks of the pyramids are pointy and can hurt, so this is not a toy for little kids