My DS is 2.3. He plays quite happily on his own for a while and I am just sitting there on the sofa. If I read the paper he has this annoying habit of driving his trains across it or throwing himself over the paper so I can't read it. If I do nothing, he takes no notice of me and plays.
Now he is getting bigger and entertaining himself more, if you are not doing housework, what do you do? I go on the computer for an hour in the mornings while he watches tv, I am usually out in the afternoons, friends house, park or toddler group, but not every day.
Also how much do you actually sit and play with them? I feel guilty as I get very bored sat pushing some trains around in a circle.