This is where a lot of my money goes.
CUBE (SHAPE CHANGING)
Get back to Square-1
An american based version of the Square-1. It distinguishes itself from the other variants because it was sold in scrambled state.
Meffert's version from 1982 with six colours.
This version has tiles instead of stickers. Has 12 distinct colors.
Pyraminx (Tomy 1981)
The 1981 Tomy version. Most samples came with logo on the yellow face.
The puck puzzle with six colours in a rainbow pattern.
A bumped variant of the Cheese-puzzle. A one-layer six segment prism.