$6 anniversary gift help?!!?!?

So my husband and I have our own little anniversary tradition. We get each other a gift but are only allowed to spend the amount of years we’ve been married. This year will be 6 years so I can spend $6. I know this sounds crazy to some but we actually have a good time with it! We also do an anniversary outing together on the day of and at the end exchange our gifts. So... If you could only spend $6 on your SO for your anniversary what would you come up with? :)