An instrument anyone can play?
An instrument small enough to fit in your pocket?
An instrument so small that you can fit enough in your pocket for all of your friends, their friends, chance acquaintances and any bystanders?
Now you're getting silly.
Of course, that's the sort of instrument it is.
Step 1: Materials and Tools
Light weight cardboard.
I will including a picture that you can print out on 8 1/2 x 11 inch cardstock to make 20 kazooz, but you can use almost any light weight scrap cardboard (cereal boxes, shirt boxes, business cards, greeting cards, incomplete deck of playing cards, the heavier weight junk mail, etc., etc., etc. )
Ordinary lightweight disposable plastic grocery bag--Actually not just the ones from grocery stores-- from Walmart, KMart, Walgreens, Target, etc--but not the heavy plastic ones.
I have never tried counting the number of kazooz you can get from one bag; but it is a LOT.
Rubber Cement --This is the best thing I've found to glue the plastic to the cardboard.
Scissors or craft knife--the only tool you really need.