Just wondering really. Ds1 has had lessons since he just turned 3 (but we took him swimming from 3 months) and is out of his armbands now at just turned 4 (well, just done his 15m).
I am surprised by how many of my RL friends don't have their children in lessons. 3 of us do (our boys are in the same class) but loads don't. I just think it's such an important life skill and the earlier learned the better.