My tray (playground) has too small borders. I’m not brave enough to put it on the table. Those thick black lines are working but of course only in his exploring mode.
So I ordered a really big (and really expensive) paper box. They should send it on Monday. With those borders I can place it everywhere.
Dimensions: 55cm x 40cm x 12cm
Such tall borders are probably an overkill. But I can cut them a bit if necessary.
Edit: Today I found even better paper box (and cheaper) so I ordered it too. This one has dimensions 61cm x 40cm x 7cm. So it’s a bit bigger and has not so tall borders. That’s great.
Edit 2: I was really surprised how can be a paper box so expensive and after I got the package it turned out that they sell them in packs of ten pieces. I have no idea what should I do with the rest of them. 