From SFBC ^[1]:

You love to bike, and now you’re a parent. When can you begin biking with your baby or toddler? Is it safe? What kind of seat should you get? Is your bike baby- or toddler-ready? Register for this (free) class to learn the medically reviewed facts about biking with a baby and/or toddler, as well as tips and tricks. Meet other parents who bike with their small children. This class is great for anyone who has a baby or toddler, is expecting, or thinking about having a family, as well as their partners and supporters.