I purchased a game last year. I think it was called Kids Against the Adults. There is a stack of cards for kids to ask the adults about their era (the last few years) and cards for adults to ask the kids (decades ago!). We're going to try this for our assembly. Pick teachers (or in your case parents') names out of a hat and kids and have them compete against each other. We have fun playing it, I'm hoping the school will have fun with it.