As a parent who spent years fitting bike seats and trailers, I know the biggest...
https://messiahwmff829.lucialpiazzale.com/can-a-baby-ride-in-a-bike-seat-without-a-helmet-for-a-short-trip
As a parent who spent years fitting bike seats and trailers, I know the biggest question is when to start. Your baby needs solid neck strength and the ability to sit up without help before joining your ride