Bar none the weirdest sticker I’ve ever seen, the Knock on Wood Touch Wood are self-adhesive patches of wood meant to allow you to knock on wood to fight off bad fortune and generally just be weird anywhere and anytime you want.
You can buy the stickers from Suck UK for £5 (appx. $8 USD). It’s cheaper than buying a wooden case for your gadget, but I’m pretty sure you can find a wooden trinket or key chain for much less. What’s next? Rabbit’s foot stickers and portable wishing wells?