Bright Starts Pop 'N Sit Portable Booster Seat

This is the travel pick, for picnics, grandparents' houses and restaurants that have run out of high chairs. It folds to about 5 by 15 inches, comes with a carry bag on a shoulder strap, and straps onto an adult chair with a three-point harness for the child. Cleanup at home is simple: the tray goes in the dishwasher and the seat pad goes in the washing machine. It is rated for 6 months to 3 years, up to 33 pounds, and it should be retired once a child can climb out on their own.