Snazzy Baby also sells the 3 in 1 Plus Combo Carrier. You can use this to keep your munchkin upright in a chair, secured in your shopping cart and attached to your body. We tried this out on Connor and found that it made a really good hip carrier for him. He thought it was so fun to be toted around on mommy. If you aren't in need of a carrier you can get the Deluxe Travel Chair which does all of the same things as the 3 in 1 without the carrier. Below you can see pics of Connor in the 3 in 1 Plus Carrier and a video of him using his Knee Pads.
Here is a video of the Knee Pads in action: