When the paint dries, the entire tray is painted with napkin varnish. Napkin varnish serves not only as an adhesive, but also as a coating varnish. The protective varnish allows it to be wiped clean later with a damp cloth.
Now place the smaller tray on edge and decorate it with a small toadstool, Iceland moss and the hedgehogs on the tray, fix them with hot glue.