Sit with your legs in a tuck jump position. Lean back, into your "sitting" position, and do your toe touch jump on the ground. Yes, you should feel this in your quadricepts (the muscle on the front of your thigh). Repeat 3 to 5 times.
Do you want your toe touches higher? Do this stretch everyday! For beginners go as close to the wall as you can! Don't give up:) For a more of an advanced stretch push yourself all the way to the wall but if you can't have someone push!