Appreciation Awards are a great way for participants to celebrate and openly recognize each other.
Have participants mentally select someone they'd like to call out for a particular act or attribute. Then, they can either make a trophy (by hocking together whatever they can find around the room) or draw up a certificate of appreciation.
Facilitate an awards ceremony, where participants say a few words of appreciation then present one another with their trophy or certificate.
Have materials for trophies handy and graphic elements for certificates visible. Have a few blank certificates on hand to fill out and present in case anyone gets overlooked.
Appreciation Awards are often the highlight of the event.