Geocaching can bring you to many beautiful places and spaces, and help you discover the world around you in a whole new way. Speaking of new, it also can lead to new purchases of items you never thought you’d need before geocaching. Invisible ink, ciphers, and more! How many items on this list do you own?

Invisible ink
Would we have purchased this before we were geocachers? Probably not. But now? Writing secret messages is just another day of geocaching! After all, we didn’t choose the geocacher life, the geocacher life chose us. Okay, maybe we chose it, but who doesn’t love pretending to be a secret agent?!

ROT13 cipher
ROT13 was actually developed by Julius Caesar (or maybe someone he knew) in the 1st century BC, and rumor has it he loved geocaching. It is a simple letter substitution that replaces a letter of the alphabet with the letter that is 13 letters after it. It’s also something we simply wouldn’t need if we weren’t geocachers!

Glow in the dark paint
Another item that while cool, doesn’t tend to be something we found ourselves in need of pre-geocaching.

Snake-in-a-can
This classic gift prank involves a fake snake stuffed into a can that when opened, pops out to surprise the receiver. While we haven’t come across too many of these, you may want to prepare yourself the next time you open a large enough geocache just in case!

Costumes
From pirates to steampunk, geocachers go all-in on themed events! It doesn’t matter if the event is five people or 5,000 (back when we could safely gather in those numbers!), geocachers bring the fun in any form.

Lock picking kit
You don’t have to be up to no good to carry this advanced TOTT (tool of the trade) with you. Some criminally difficult caches require these tools to open and retrieve the logbook. Though lock pick kits may not be legal everywhere (make sure to check)—there is continued interest in this type of cache among experienced cachers.

Zip ties
You might be wondering what zip ties have to do with geocaching. Turns out they are very handy for attaching caches to poles, columns, or other structures! Though it’s probably best to purchase these separately from the lock picking kit so as to not cause any worry!

What’s the strangest item you’ve purchased to support your love for geocaching? Share in the comments below!