Target is offering The First Years On-The-Go Booster Seat For $19.99. Keep your growing child safe and secure when you are working, with the first year's on-the-go booster seat. It can accommodate up to 50 lbs of weight and comes with an adjustable safety belt that holds your child securely. It's made of high-quality materials and is easy to use. This booster seat is compact, lightweight and comes fully assembled. The first year's on-the-go booster seat also includes two chair straps to secure it to any standard-sized chair. Buy Go Booster Seat Online. Free Shipping.