Magic DominoThe 1982 Politoys version with a spindle mechanism.
Mahjongg DominoThis Domino shows symbols taken from the Mahjongg-game. Also exists as Black/White.
Master QuartetThe bigger cousin of the Quartet with two layers on each side.
Mental BlockToday this can be considered as one of Tony Fisher's classical Skewb modifications.
Micro 1x2x3A 1x2x3 with 6 mm cubies, making it the smallest ever made.
Micro 2x2x3A 2x2x3 handmade from a 19 mm Micro Rubiks cube.
Mini 2x3x3 wannabeA simple modification of a 2x2x2 done by extending the pieces so that it appears to be a 2x3x3.