The Hyperdo is a 3D projection of a 4D object called the 120-cell (aka Hyperdodecahedron).
But instead of trying to understand these words, get your hands on this kit and enjoy this stunning model!.

Here's a YouTube video on building the Hyperdo by Kevin Kelly, Senior Maverick at Wired magazine (he co-founded Wired in 1993):

https://www.youtube.com/watch?v=1AC1nGpQl1M&t=32s&ab_channel=CoolTools