The process is a little complicated.
Go to the FTCA web page, create an account (free). As soon as you do that, you are entitled to download the FT Simple Stick plans.
I've built 2 FT Simple Sticks from FT kits and then about 4 more partial or complete to repair or replace crashes and mid-air meets.
My printer will only do 8 1/2 x 11 pages so it takes about 24 pages printed out and then carefully Scotch taped together to make three full size sheets which correspond to foam core board purchased at Dollar Tree or Dollar Store or whatever they call it in your area.
I still fire up the FT Simple Stick build video by Josh Bixler available free on You Tube when I am building new parts because it is too much for my tiny brain to remember accurately all the clever little ways the parts are assembled.
A folds, B folds, C folds, cutting first layer of paper and most of the foam but not the second layer. Holding a sharp knife just so and cutting at a 45 degree angle to make a good hinge, hot glue temperature. It goes on and on.
The plane flies beautifully when you get everything pretty good. Perfection is the goal but is seldom achieved. Flies great anyway.