Stickers, stamps, charms, postcards and pennies

I now have acquired a routine for each major stop that we make for example, Mt Rushmore, Niagara falls, Boston. For each stop I must get a sticker for the back of the camper, a few postcards to send home and a charm for the charm bracelet I am making of this trip. A couple other things that I am obsessively acquiring are the smashed pennies (i even have a holder) and cancellation stamps. If you aren't familiar with cancellation stamps, they are something that the National Parks are doing. You buy a "passport" that is divided up into regions of the united states and every time you visit a National park, museum, monument etc, you stamp their cancellation stamp in your passport in the correct color coded region. I started this in Yellowstone last year. I have gotten stamps at Mt. Rushmore, the John Adams House, the Statue of Liberty and even the Capitol to name a few. This has been fun but can be a source of irritation when I forget to do it (the little bighorn) or mess up and put a stamp in the wrong region (the statue of liberty and Arlington which is not in Wash DC but in Virginia as the cashier at the visitor center so kindly pointed out.) This is a great thing for kids to do too and they even have a kids passport book. My kids have helped me but I am the one that is obsessed with it in the end.