Portable booster seat

The BubbleBum ($29.99) is an inflatable, portable car booster seat that’s ideal for those times when you don’t have access to your kid’s regular booster.

Think vacations, rental cars, taxis or carpooling with friends.

We tried it and loved how easy it was to deflate and pack down into a bag about the size of a small loaf of bread (definitely compact enough to take on the plane).

Because it’s simple (no cup holders or arm rests), it’s narrow enough for families trying to put three kids across in a single car row.

We would recommend it primarily as a travel accessory or a back-up seat, however, because of one downside: You have to spend extra time threading the seatbelt through two positioning clips to make sure the seat is held securely in place.