Start at the top & after each elastic, do your tuck under knot & then go on to the next.
I did 3 going down the head on both sides.
Once you do 3, you've got your 2 piggy tails left. Continue with the tuck under knots on the pony tail until as far down as you want to go.
& we're finished. This would work on long or short - even if you just went once or twice down with short hair. It's super easy & pretty fast when we're in a hurry to be going somewhere.