I really couldn't tell how thick the ice was where we were, 6" maybe. we only went out about 100 yards. I am pretty sure if I fell through I would have only been standing in a foot of water LOL!
Yeah.... ice skating on the lake would be tricky. Maybe if you cut a hole and let some of the water seep out and freeze, then it might work.
I have been pleased with how well my little guy has been handling the cold. it doesn't even seem to phase him very much.