The First Years’ latest booster, the B540, is a somewhat new and reasonable choice on the booster seat market.
For starters, it folds in half, making it appealing from a storage perspective. With a quick fold, you can have it in the trunk of your car for those days you’re carpooling or taking an extra kid home with you. (I only have two kids but I always have seating for at least three kids in my car at any given time with an extra booster in my third row.)
The B540 has a color-coded seat belt that eases installation worries and according to my son it’s “really comfy!” When I asked him what else he likes about the booster, he reminded me of the “cool cupholders” on either side of the booster that allow the kids to have easy access to a sippy cup or other extras they may be carrying with them in the car. (We’ve used it for the traditional cup, but also as a McDonald’s French Fries holder, toy holder and as a convenient spot to pop a Nintendo DS when not in use.)
This booster is intended to fit kids from 30-100 lbs who are 38″-57″ tall (around ages 3-10). Retails for $99.99 but it’s currently on sale on Amazon for $83-$87 depending on the color you pick and ships for free.