Luna, hope you and DS are better VERY soon - poor little chap!
DS has had me in stitches today - he has some stacking blocks that he piles up (there are six of them and the slot onto each other - hard to explain, but basically they show all different faces when they are put together) - today, he built his tower and crawled round it, shouting. Turned out he was looking for the cat face and couldn't find it! When he did, he clapped and laughed!
He also signed and said bird today - was pointing to them in the garden, totally fascinated. He said "Bur"