@kimu
That sounds like a cool party.

It also reminds me of a trinket swap booth that some kids set up in my neighborhood.

The colorful booth looks like a Little Free Library but is lower to the ground and contains shelves full of small items such as pens, pencils, paper clips, small rocks, stickers, etc. A sign says to take one and/or leave one.

Now I am wondering whether the neighborhood corvids use it...