Under-chair Seat Booster
Enter the Kaboost—an under-the-chair seat booster that eliminates the need to buy costly and bulky high chairs, or unstable seat boosters. The Kaboost raises the whole frickin' chair instead of dangerously raising your kid on it. By raising the whole inertia thingy (or whatever you call it) of the chair, your raise the balance point as well. Your child is safe, sound, and you get a portable, reusable seat booster that works with virtually and four-legged chair.
By the way, did we mention that it is totally adjustable in height and in leg width? And, it weighs a mere 3.5 pounds but can support up to 300 pounds! Totally awesome. See video demo below.