3D Lego Duplo Cubes - Build all Sides

These are 3D cubes I made to fit on to Lego Duplo blocks to be able to build on all sides. Enjoy!

2x2 Cube: https://cad.onshape.com/documents/851915250163337b486035cf/w/64cb642d65bd414a41f7d2ce/e/afa85ba022b38bf4736181e4

4x4 Cube:
https://cad.onshape.com/documents/eaacadffe60831f73bcb694a/w/990744f29bf004d636572a92/e/a703c2f1517a289d067dca65