Just an update, the weather did not hold. It rained, a lot. We were indoors. Entertainment was provided via the game Rockband. I had 15 12-13 year old boys gathered around the TV for hours playing drums, guitar, and singing. All were completely behaved and engrossed. Vacuuming the chip crumbs was the worst damage. Highly recommended. I considered playing hookie from work today to continue my drum solo career. It is great fun when the weather is bad.