Designed by Khono Ichiro, made by Eric Fuller 2021.
(Canzan wood with magnets, each block 1" square x 1/2" thick)

Three pieces, each formed with two 1" x 1" x 1/2" half cubes with little magnets in their center, snap together to form three 1" cubes. Fun and easy to solve by trial and error to get the magnets to line up properly.