Wait until your child is one. They must sit independently and support their...

https://www.click-bookmark.win/wait-until-your-baby-is-one-year-old-and-sits-up-unassisted-they-must-hold

Wait until your child is one. They must sit independently and support their head while wearing a helmet. Trailers provide the safest environment for infants, while front or rear seats suit active toddlers. Keep your first rides short and smooth.