Simple legs to convert any Ikea Ivar shelf to the free-standing table/desk/shelf.
Use one wood screw (for each leg) that fits and small enough not to puncture the shelf through.
My gf used it as a displey riser and workspace organiser. We also have used one to build a protection for cables, routers and electric stuff behind our TV to protect them from our cats and give them a space to play on (see pics).
Use PLA/PETG with 10% infill for low load and adjust for bigger ones.
The author marked this model as their own original creation.