I really liked the original 4x4 Puzzle Cube design. I just wanted to have something that I can fidget with. This is my remix with magnets. 

Use 20 pieces of 6x3mm magnets. It's a tight fit, you need to force the magnet to go in. Don't need to use glue.  

The puzzle is actually easier to solve this way. 

Make sure to put the whole puzzle together before inserting the magnets. Go one by one to have the matching magnets on both sides. 

Try to push it against a desk, or if it doesn't work try to clean the hole a bit before inserting the magnet. 

Please press like if you printed it!

Enjoy.