Joie Stages The Joie Stages is a Group 0+/1/2 Car Seat that is suitable for use from Birth to 7 Years. It starts off life as a rear facing car seat and can be used until your child is either 4 Years old or 18kg in weight, whichever comes first. Once your child reaches 9 Months or 9kg the Joie Stages can then be used as a forward facing Group 1 or Group 2 Car Seat.