The Radbox is a small puzzle box that can be opened without any tools of exterior objects. It is printable in 8 parts (5 different) and can be assembled with or without glue, depending on your printer tolerance.
Use it as a gift and use the small compartment to hide small objects or money.
To unlock the box, roll it 45 deg to the left and push the lid further back. In this position, the box is half unlocked. Then keep the lid in this position and roll the box 45 deg past the horizontal to the right and push the lid in the same direction as before.
To help with the unlocking, the lid can be wiggled approx. 1 mm to allow the discs to rotate freely.