I bought a little holder at my local zoo's gift shop. It is a small canvas holder that slides over a belt - it's slightly larger than a credit card. Just the right size for tickets, some cash, debit card and lip gloss.
I don't like the idea of wearing something valuable around my neck. Could fall off, fly off on a ride, etc. too easily. Plus, I know it would bug me having it hanging around my neck all day!