When I was at the Metropolitan Museum of Art a few weeks back one of my colleagues told me her 25 year-old son comes to the Met to play scavenger hunt types of games in the museum. I have heard from other educators who have done this type of activity. They take a group of students to a museum or a zoo and give the students a list of clues. When the students find the object in question they either send a text with the information or send a photo. I imagine this would be a fun way to make sure all your students made their way around a particular museum and took in all the wonderful sights.