This is more of an observation than a question or concern...

I've always tried to spend a decent amount of time playing with DS each day - reading him a book, playing with his toys together, singing songs, etc.
However, in the last month I've noticed that he really seems more than happy just to play by himself. I'll go to sit and play with him, but he basically ignores me and keeps playing by himself happily, lol. I mean, he enjoys my company and loves doing things with me... but he's also happy to play by himself. It's great, cause it means I can get things done, or (like now) go on BB and just keep an eye on him. But after a while I start feeling a bit bad, like I should be doing more things with him.

I'm guessing this is pretty normal for this age - that DS is able and happy to play alone?