Theres nothing like being able to rotate geometries in your mouses hands in order to get to know them properly!
So long as you have Java installed on your machine (and most do)
You should be able to click the link below to browse a collection of simple geometric constructions
like nested platonics and rotating rainbow dohnuts.
Created by the Heart Coherence team – quite some years ago now – its the next best thing to actual models made of bamboo skewers or plastic construction kits!