My boys will be 10 in 2013 - can't wait to hear how the party goes. (I can use the pointers.)
We did a fondue dinner last night with the boys and 2 friends. First course was cheese served with veggies, pretzels and bread. Second course (about 40 minutes later) was chocolate served with strawberries, bananas, marshmallows, grahams, and pretzels. Surprisingly, the biggest hits were the carrots & cheese, and then all the fruit with the chocolate. (They cleared me out of bananas and strawberries - I forgot about the apples until the end otherwise, I think that would have been good too.) I didn't keep everything out for too long, otherwise I think a mess would have begun. They all knew too, when they were done, I was cleaning it up. Everyone just crowded around the kitchen table, ate, and ate, and ate, and left to play - VERY easy to clean up - surprisingly.
Also, with the kiddos last night, and all the new video games, unboxed legos, a new telescope, microscope and a metal detector.....they played with an old Discovery Toys marble maze I've had since before they were born. My husband found an old bottle full of marbles and they were in heaven - played for 3-4 hours. None of it planned - of course, it wasn't a birthday party. I guess my point is, kids will find something to do.
(I do LOVE the lots of large boxes idea, but I'd do the boxes, scissors and rolls of duct tape. I can only imagine the possibilities.)