In answer to your $2 bill question -- I don't remember them getting alot of use: not getting them as change at the store nor getting them from my parents when we wanted to buy something.  My guess is that the $2 bill is just too close to the $1 to stand on its own (just about as easy to pull out a couple of $1's as a $2) and it doesn't really make math in one's head any easier: "OK, $9 - that's $5 and two $2's" or "Hmm, $8 - a $5, a $2 & a $1"  Seems like $1's alone are just as easy.  I do have a $2 that I saved when I was a kid.

Green stamps were fun - ours would pile up in bags and then when somebody brought homw the little newsprint quality booklets, us kids would count & lick to get them all glued in.  It was 100 tiny 1 cent stamps per page.  We were happy when some major shoping had generated the 5 cent and 10 cent stamps because they filled up the books quicker!  We also lived places with yellow stamps - a less well know competetor.  It was great fun to "window shop" at the redemption center where you could take home something immediately if it was stocked, rather than waiting for it to be shipped to the center (kind of like picking up a catalog order at Sears).  Shortly after I moved to my first apartment I got a hand-cranked ice cream maker purchased with stamps as a present from my family.

We did savings bonds through school when we lived in California, but not when we moved to Ohio.  Does anyone remember the Ohio (and maybe other states??) tiny sales tax papers? They were about the height of a fingernail and twice the width.  Some (all?) were printed on green paper and I'm too young to remember clearly but maybe they were turned in with income tax or kept to prove sales tax deductions or something.

Walt Disney World uses a single finger ID system at the parks to ensure that just one person uses a multiday ticket.  Some folks get a little freaked by it, but it is certainly much faster than requiring everyone to sign their tickets and then pull out ID's to compare!  --Kay