Saw this and immediately laid on my kitchen floor. Pilates Alphabet - lie on the ground, raise your legs and write the alphabet in the air with your feet. - My stomach was on fire after this! Great learning style activity workout too! LOVE THIS IDEA!
Ballet Abs - I don't remember doing any of these separately (except for crunches) when I use to dance. I got my "ballet abs" by holding it in during class for 10 years; however, these exercises are great for anyone.
Eliminate the pouch: 3 sets of wall holds for as long as you can this works out what most women call "the pouch" or your lower abdominals! Plus this link has 6 other Waist-Slimming Ab Exercises w/ a short video for each step