Most kids ride safely around age one. Your little one needs strong neck muscles...

https://www.bookmarkidea.win/wait-until-your-baby-sits-unassisted-and-holds-their-head-steady-typically-by

Most kids ride safely around age one. Your little one needs strong neck muscles to support a helmet. Try a front seat for interaction, a rear seat for better stability, or a trailer if they need to nap. Always prioritize a steady, upright posture