Around Easter time I do a "Math Egg Hunt" with my first graders. You will need 10 plastic eggs in each color: pink, yellow, green, blue, and purple. Each riddle page gets cut up. Put one riddle in each egg of the same color. Then, hide the eggs and break your students into 5 groups (if I have less students I only use 4 groups and don't hide the fifth group of eggs). I give each group an answer sheet and explain the rules. I usually allow one group member from each group hunt for an egg. After finding an egg the group member brings the egg back to his/her group and they answer the math problem together. They answer on their riddle sheet. Remind them to answer the correct number question - many students like to answer the first egg on the #1 line not realizing the first egg may not be #1. It is a little confusing for them right at the start but they soon get the hang of it. I usually have one or two other adults in the room to help. The kids have so much fun with this egg hunt!