I wanted to build some side tables for our IKEA Brimnes Bed. Went with a simple L-shaped Design in wich the table is just attached to the bed frame with some 3d printed clips. They have a fairly snug fit on the bed frame. They are attached to the table with with 3x16mm screws with a 6mm screwhead.

The tables are made out of some 18mm pine boards that are 300mm wide. The tabletop ist 500mm long and the "foot" section is 474mm high (Bed frame height is 470mm, added 4mm for the thickness of the bracket). I joined them together using dowels and just painted them white to match the rest of the bed. They are designed so the drawers of the bed can still be opened.

For one of them i added a IKEA Trofast Box as a drawer using the "Ikea Lack drawer hangers for Trofast storage bin" (https://www.thingiverse.com/thing:2767910)