Doodlebug is 6

And this age is best summed up by the amazing A. A. Milne

The End
When I was One,
I had just begun.
When I was Two,
I was nearly new.
When I was Three
I was hardly me.
When I was Four,
I was not much more.
When I was Five, I was just alive.
But now I am Six, I'm as clever as clever,
So I think I'll be six now for ever and ever.