Anything that you expect to change in the coming years:
A picture of a gas station’s gas prices.
Ads for electronics
One of those supermarket tabloids about Hollywood.
Don’t put in:
Coins, they’ll always be available
Newpapers, boring, and available at the library
I don’t advise books. It’s rare that any of them increase in value over time. My dad had a huge library of popular books. Only about 1 in 20 is worth even $5.00 now, the rest are just bulk garbage.