Well, I'll say this; If you don't learn to ride a bike as a child, you'll look aweful silly with training wheels on your bike when your an adult.

Almost happened to me. I didn't get a bicycle until I was seven, on account my Dad was unemployed and he said he had no money.
My first bike was a black Royce Union with a banana seat, but I had to ride it with training wheels for a while before I could get the hang of it. I looked silly having training wheels at seven, most children having outgrown them by then.