With unrestricted access to all materials and tools, you will be able to tinker to your heart's content.
Maybe you leave with a finished project, maybe you don't.
The point is to play alongside your friends!

A wee sampling of things you can make:

a needle felted wall hanging
miniature clay fill-in-the-blanks
a sock puppet
a diorama
a stuffy
a stop motion movie
a patch/pin/keychain for your backpack
a bracelet for your friend
a fidget board
a mask
a little pouch
a holiday ornament
a zine
a yard sign
a papier mache something-or-other
a stamp with your personal logo