Also, every year more and more people show up. This may be related to word of mouth. I think I can narrow it down more than Steve. Keep the mothers happy, they tell their friends, their friends try it, they tell their freinds. If you upset the mother, it is less likely that family will be back. We have been blessed with great help for these, a significant amount of planning and prep, and some luck with the weather. This has all combined to another great event that the museum has proven it can put on.
Lets continue to build on it, make the necessary infrastructure improvements we have been, and enjoy the happy crowds.