Activity, Worked & Didn't Work

Earlier this semester, I did an activity for Safety. I let the students pick their groups, but told them one student in the group had to be someone that they didn't know. Each group had to "dress up" one student for Personal Safety Protection. They had a sheet with guidelines, and specific protection devices. Then the class had to rate which team did the best. I had issues with getting the students involved to vote which "safety" student was the best. Then they "dressed up" a student for unsafe personal protection practices. They had a blast with that. The issues were getting the class involved to vote on a winning team. I switched the voting for the next class period to "points of safety/unsafety". This worked better. The dressed up student got points for safety or unsafe practices. The students had fun, they were all laughing and being competitive the second class that I did this activity in. When I took the "voting" away from the class, and just asked the class "how many points of safety are covered on this dressed up student", it worked much better. I wasn't really sure why one class period was just not interested in the activity, but the students learned what they were supposed to, and we moved on to the next lesson.