Just a basic print of a 249.8 mm x 150 mm x 56.5 mm, slotted platform. It is also optimized for sheet metal bending too (1.5 mm galvanized steel), thus the Step file and DXF attachment.

If printed with PET-G preferably, or PLA tough/ABS, appropriate infill density, and she'll count, it could serve a very functional purpose.