The Thule Yepp Nexxt Maxi is the most popular child seat for the rear rack of the Workcycles Fr8. It's lightweight for a seat of its size, yet sturdy, and it securely attaches to the rack with ease. It's also quick to strap your child into the 5-point harness thanks to its magnetic childproof safety buckle, and the adjustable foot rests and foot straps keep the seat comfortable as your child grows. The seat holds a maximum of 40 lbs and is generally good for a child between the ages of nine months (when babies can support their head weight and sit up on their own) to six years old. Though, it is recommended to consult with a pediatrician for children under 1 year old.