If you find yourself stuck trying to entertain kids for an extended period of time, thwap's schoolyard recommends giving "Wreck-It Ralph" a try:
And, it seems that 1995's "Jumanji" (with the late, great Robin Williams) still holds up. (My 8 year old has seen it three times and he was still eagerly anticipating and terrified of the crocodile attack. Plus he liked the monkeys and everything.)
Remember, these are movies for kids. I ain't saying they reach the heights of "The Room" or "Plan 9 From Outer Space" or anything.