Conversation with Tim this morning on the way to school...
Tim: I'm going backwards.
Tim: Because your feet go further than mine.
Me: That's because my legs are longer than yours - see? *demonstrates* When your legs are as long as mine you will be able to keep up. In fact, you'll probably be taller than Mummy. You might even be taller than Daddy.
Tim: But I will still hug you because I like you so much.
Me: *melts* Oh good, I'd like that.