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.
|Arch Linux badge sticker|
|Ubuntu Circle keyboard stickers (x0)|
|Bash sticker full logo|
|git badge sticker (0)|
|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.