Wait until your baby sits upright unsupported and holds their head steady with...

https://star-wiki.win/index.php/What_Is_Safer_for_Gravel_Paths:_Trailer_or_Seat%3F

Wait until your baby sits upright unsupported and holds their head steady with a helmet. Most start around age one. Front seats keep kids close, while rear seats handle older toddlers. Trailers offer the best stability for small passengers