So for a few days now Byron's been doing this sign that I didn't recognise but he did it with such determination and intent I was sure it was a sign. He holds on to his right index finger with his left hand and sort of slides off it and repeats it. I had no idea what it meant and thought he must've picked it up of Something Special or somewhere else. I meant to ask DH last night but he was working late and it slipped my mind. Anyway DH mentioned it tonight and has worked out that it means to pick him up! We walk him round him holding on to our index fingers so he has invented this sign all by himself. I feel not a little proud of this development.