Shop Safety 1st Jive 2-in-1 Convertible Car Seat online at Macys.com. With the Jive Convertible Car Seat, you have one less decision to make because you get two seats in one. It keeps your child safe, from 5 to 65 pounds. Your baby can ride comfortably rear-facing up to 40 pounds. When the time comes, your big kid can ride forward-facing up to 65 pounds.