Answer: As many as you have.
When the kids are young the milestones are simple things like first teeth, first step and first sleep-overs. Teenagers have milestones too and last night my oldest, Sara, planned her first party. Of course, she had helped plan birthday party's before, but this time she planned a surprise party for a friend who is going to spend a semester abroad. She planned, shopped and cleaned up for the party and it all went off without a hitch. Her friend was totally surprised and the kids all seem to have a good time. They ate, danced, jumped (on the trampoline in the backyard), talked, and ate some more. Hubby and I just stayed out of the way as much as possible, since we are also in charge of making sure that the food platters stayed full. As an added bonus I have to say that they totally road tested the deck that Hubby added to the deck a few years back. I can say that we have had a whole heard of teeagers jumping up and down on the deck in time to the music, so that means that the deck is definalty structually sound.
My younger daughter also had a big yesterday. It was her stage debut as Tybalt, in Romeo and Juliet. She was wonderfully blood thirsty in the role. My how quickly they grow.
All this activity has lead to a decided lack of craftyness around the house and the bathroom remodel continues to plod along so not pictures on either of those fronts. I really hope to have some bathroom pictures for you soon.