As a former bike shop service writer and parent, I recommend waiting until your...
https://gregorywads092.lowescouponn.com/what-age-can-a-toddler-ride-in-a-rear-bike-seat-a-mechanic-s-guide-to-family-cycling
As a former bike shop service writer and parent, I recommend waiting until your baby can sit upright, unsupported, with strong neck control. This milestone usually happens around one year old