Is Blake getting upset when he's doing the kicking, or is it just something that he does because it's fun? Is it possible that being put to bed has turned into a bit of a game for him because it's fun to kick the blankets off?

The reason I ask, is because around the same age (a bit younger actually from memory) Jacob started to do the same thing. He would kick the blankets off each time we put him to bed. He'd start doing it as soon as I started trying to tuck him in and he thought it was one great big game and would be giggling away. In the end, we decided to do away with the blankets and just put him into a sleeping bag - so there was nothing for him to kick off, no games to be played in bed! That solved the problem for us (he worked out that there was nothing to do in bed except sleep IYKWIM) and saved us being concerned about him getting cold. (Mind you, Jacob developed other sleeping problems at 6.5m, and that's a whole different issue!)

He is now 16.5m old, and it was only when he was 13m old that we re-introduced blankets and he doesn't kick them off now, but he does wriggle out of them quite a bit during sleep.

I'm not sure if any of that has helped....sorry!