There is nothing quite like the unbridled joy of the toddler. My son is two and alternately enjoying life so much that it becomes necessary to do a little dance about a tower of bricks, and then despairing so completely at his inability to correctly hook up his Thomas train to its trailer that he needs to scream and wail and lie face down on the floor for a while.

Of course, my favourite moments are those when he is crazily excited. Occasionally, something is so overwhelmingly wonderful that he exclaims: “SANDPIT!” at top volume. It took us a while to work out why. We now think it must be because the best thing in the world is, obviously, a sandpit, and this is the only way he can express how wonderful something is: it is Sandpit.