Wait for your child to sit up independently and support their head in a helmet...

https://smoothdecorator.com/cold-weather-biking-what-should-your-baby-wear-in-a-bike-seat/

Wait for your child to sit up independently and support their head in a helmet before riding. Use a trailer for infants. Front seats offer great views, while rear seats provide extra stability. Always prioritize comfort and a properly fitted helmet.