A restraint seat for use in vehicles with restraint systems having inflation devices is disclosed; the seat has a seat body housing, a seat body attachment means for securing the seat to a vehicle seat assembly, the seat body means securable to the seat body and a child restraint harness affixed to the seat body housing for restraining a child. The child restraint harness includes one or more inflatable belts. The harness is connectable to the vehicle restraint system which includes an inflation device, wherein the actuation of the vehicle inflation device inflates the one or more inflatable belts of the child seat. The harness further has a tongue for connecting the harness of the child seat to the buckle of the vehicle restraint system.