Convertible Child Safety Seats

child safety
Childcare, child care, or babycare is the act of caring for and supervising children usually from 0–8 years of age. (In the UK and Australia, day care is referred to as "childcare".

convertible
(of a car) Having a folding or detachable roof
Able to be changed in form, function, or character
a car that has top that can be folded or removed
a corporate security (usually bonds or preferred stock) that can be exchanged for another form of security (usually common stock)
(of currency) Able to be converted into other forms, esp. into gold or US dollars
capable of being exchanged for or replaced by something of equal value; "convertible securities"

seats
A thing made or used for sitting on, such as a chair or stool
(seat) a space reserved for sitting (as in a theater or on a train or airplane); "he booked their seats in advance"; "he sat in someone else's place"
The roughly horizontal part of a chair, on which one's weight rests directly
seating: an area that includes places where several people can sit; "there is seating for 40 students in this classroom"
(seat) show to a seat; assign a seat for; "The host seated me next to Mrs. Smith"
A sitting place for a passenger in a vehicle or for a member of an audience