Last year we did 4 contests, one for each week of the month.
We have a lot of employees too.
We did a Hidden Picture contest hiding safety items. I found an artist on line and she custom drew our facility with hidden safety items, mostly personal protection. It was a big hit. I can give you her # if interested, she was very helpful and reasonably priced.
We also did an electronic scavanger hunt, we had a few questions and they had to go to sites to get answers, like OSHA etc.
The year before we had Safety scratch off cards and had some instant winners, but all qualified for the drawing for big prizes. I found the site on line also. The employees enjoyed the instant winners.