With apologies to AA Milne

When he was One, he had just begun.

When he was Two, he was nearly new

When he was Three, he was hardly he

When he was Four, he was so much more

When he was Five, he was very alive,

But now he is six, he's clever as clever, 

and I think he'll be six now for ever and ever. 

(Or maybe just a nice long year.)

Happy birthday to my baby, my big boy, my engineer, my scientist, my enquiring mind, my constant talker, my reader and writer, my machine-maker, my glass-half-full optimist, my heart, my son.