I bought some unixstickers.

Unixstickers is a vendor that sells (high quality) stickers and swag (things with logos printed on it), donating a portion of the revenue to the respective open source projects.

These stickers will be given as rewards for completing practice labs.

Stickers table

Sticker	Description
	Arch Linux badge sticker
	Ubuntu Circle keyboard stickers (x0)
	Bash sticker full logo
	rm -rf / shaped sticker (0)
	git badge sticker (0)
	Budgie sticker
	Tux square keyboard stickers (x2)
	Kali Linux badge sticker (x10)
	Kali Linux dragon (x0)

I also have a few laptop camera covers from Lockheed Martin.