Rubik's 2x2x3 blocked
I have seen the mechanics at the split 1x2x3 cube. It's the same but increased to have full blocks.
Print 2x mid part and 8x side part. needs support. Mid part need rotation to printbed. Screw together with M3 screw and self locking nut.
scad file: maybe you like to print colour plates (instead of stickers or paint): increase the depth parameter of side holes (pd), and also activate the (square) plates. Print in colour and glue in the side holes.