Quite a challenge! I have a 9 yr old son and a 2 yr old daughter. Son ends up making a lot of compromises as a result! And I DO offer and provide numerous activities for her(painting, clay and playdough, markers, all kinds of interesting things, but she is as demanding as her brother always was, lol!)
It can be very dificult to spend one on one time with him (as for a math worksheet/science experiment/reading from a chapter book) without her horning in in an intrusive way. I realize it will pass soon as she matures and is more able and willing, but at times, it is difficult. (and she doesn't nap very often anymore, darn!!
I def. agree that offering interesting activities helps, but sometimes it doesn't do the trick; I accept that we will just have to work with it for a while longer (and soon, we will have 4th player at scrabble/cards/dominoes, etc, lol!) kimberly, mom to Forest, 9 and Lily, 2