Celebrate Earth Day 2026 with a creative Earth Day STEM challenge for 4th & 5th grade! Students design a carnival game using reusable materials in this fun, hands-on Earth Day activity and craft—perfect for Earth Day STEM and project-based learning! It requires students to: research carnival games, take inventory of reusable materials they have at home, develop a plan for making a carnival game, create the carnival game, and write down the rules of the game. This Earth Day activity comes w