ideas for blokes?

so yeah, basically every year this school opens up the opportunity for the young people to skip last two periods of the day and come to a christian union christmas service (suprisingly a lot of people seem to be christians on that day!!). The theme the teachers have chosen is darkness to light. There will be a talk and then the kids can respond which we do with activities. There are loads of craft ideas, but I need something that the boys will want to do! They have about 10 mins to do this activity!

cheers in advance x
lou