What I have done once or twice is prepare little (half or quarter sheet) forms with room for a name, and artist and title for two tracks. On the back it had the explanation that this is a competition. Write down your favorite track now and you favorite track ever. At the end of the night there would be a price for the best track in either category.
35 kids ment 70 tracks. Added to the really big chart/top 40 bangers of the last 2-3 years, I suddenly ended up with enough music for the 8 to 11 function. Gave away two cheesy DJ T-shirt as prices or something that I had picked up online for 5 bucks each and 10 bucks bought me a lot of piece of mind :-D.
During the evening I would ask them to let me hear how much they liked the previous track by shouting out loud.
Great fun. Once kids that age group are over the “being cool” factor and into it, they will go full out.
So enjoy.