4-H National Youth Science Day (NYSD) is the world’s largest youth-led science experiment. Every year thousands of youth across the country take part in the event. NYSD provides access and opportunity for kids to learn about STEM topics by participating in a hands-on STEM challenge. Each year, National 4-H Council offers a new challenge for youth to complete.

NYSD events may be hosted locally by county Extension offices, afterschool programs, school enrichment programs, or even camps. In fact, any educator is welcome to facilitate the NYSD activity with their students. Kits are available for purchase which include all the materials and instructions educators need to facilitate the challenge.