This is an at home project that I send home with my students to celebrate the 100th day of school. I attach the sheet to a paper bag and students bring them back taped or stapled shut with their items inside. Their clues are written on the sheet on the outside of the bag. They present in a show and tell type manner and tell the class their clues. Three students try to guess what is in the bag. If no one guesses correctly then the student shows the class their item. To extend this activity, you can also have students put the items on their desk and sort into groups of 5's or 10's or any other variation.