Those look like replicas of colonial paper currency. Get them authenticated anyway because real examples are worth quite a bit. I used to work at a coin shop that dealt in this kind of thing also.

this may be worth x-posting to one of the currency collecting subs e.g. /r/numismatics

Hate to be the glumbum, but the paper doesn't look right for the time period, it looks like machine-pulp paper of the modern day in a "vellum" style, like you might buy for craft projects or wedding fancies. Paper from the period should look like this (scroll down), with the charactaristic line-marks, or this for less commercially made stuff. It should also NOT be crumbling like that, 18th century paper is actually really quite study, the fibers are very long. The way it's breaking and crumbling (and yellowing) indicates that it's wood pulp paper with a high acidity, so modern. 18th century paper is much whiter than you'd think it would be, when you work with it. After the mid 19th century paper goes to pot with wood-pulp technology. (I'm an archivist and I work with old paper all day.)

But I think they're some neat souvenirs from Williamsburg or somewhere like that! Maybe from the 70s or so from how decayed the paper is (they were turning out some awful paper in the 70s), the Bicentennial was a BIG time for people buying revolutionary-era thingies. My Grandma Ruby certainly got all sorts of Americana crap at that time. :)

I'm not a huge expert in this area but it looks like a collection of revolutionary war bonds. They're in pretty rough shape. Here are some examples of Connecticut revolutionary war bonds http://www.glabarre.com/category/Connecticut_Revolutionary_War_Bonds_Pay_Orders_etc_/c67 looks like a lot of yours were issued in different states it might take a bit of work to figure out if there are any famous signers on the notes!

Edit: I think you have US and British bonds as well if I'm reading them correctly.

Edit 2-make sure you're handling the papers with cotton gloves as the oil in your hands can further degrade the paper.

Edit 3- get them authenticated as there are a number of forgeries going around for paper bonds and notes from this era.