Shop Babies”R”Us for Convertible Car Seats that can be installed either rear- or forward-facing based on the child’s height and weight. This versatility allows you to use a Convertible Car Seat from the newborn phase through the toddler and preschool years using a secure five-point harness, until they are tall and heavy enough to transition to a Booster Seat that uses the vehicle’s three-point seatbelt.