What age can you start to do a forward roll?

There's no single age at which a child *must* be able to do a forward roll. It depends heavily on individual physical development, strength, and coordination. Some children can master it as young as 3 or 4 years old, while others might not be ready until 5 or 6. It's a developmental milestone, not a strict age requirement. Focus should be on the child's readiness, not their chronological age.