4-H STEM Challenge

4-H STEM Challenge logo
The 4-H STEM Challenge, formerly known as 4-H National Youth Science Day, is an annual initiative to inspire kids everywhere to take an interest in science, technology, engineering and math through hands-on learning.

For the past 13 years, 4-H has developed fun, accessible challenges that shows kids how STEM skills can be applied to the world around them.


October is 4-H STEM Month

Plan your STEM activities during October using the STEM Challenge kit - and share it with us on social media! Just tag us @California4H on Facebook and @ca4H on Instagram.

Explorers of the Deep
Explorers of the Deep

Designed by Rutgers University, Explorers of the Deep, focuses on the mysteries and adventures of ocean exploration—with robots! Ocean exploration helps scientists prepare for and adapt to changing ocean conditions. Many of these changes in ocean conditions are affecting the environment, such as melting glaciers, increasing ocean temperatures, declining fisheries and an increase in frequency and severity of storms.

The three activities develop your observational and critical thinking skills while exploring the interconnected nature between the ocean and humans, regardless of where you live. Learn about the incredibly complex relationship between Earth’s oceans and the global climate.

Kits are available in early August

New this year is the ability to customize the base kit to include more participants or add extra supplies as needed.

  • Kit includes materials for?4-6 youth?or more if rotating to participate in the offline activities at the same time.
  • Additional supplies (youth guides, gliders, and board games) can be purchased to expand the number of youth a kit can serve at one time.
  • Kits can be used in spaces where physical distancing can be observed.

Ocean Robot Test Tank

Get your ocean robot ready for a research mission! Learn how to “ballast” your ocean robot by adding weights to create the sinking and floating behavior of a real ocean robot. Investigate data collected by ocean robots and learn about the value of ocean exploration.

Ocean Expedition

Through an ocean-inspired board game, you will navigate your ocean robot around the world while learning key ocean concepts such as aquaculture, climate change, technological innovation, human impact and the ocean ecosystem.

Ocean Communicator

Investigate challenges that ocean scientists, engineers and technologists are currently exploring. Each challenge requires innovations and technical solutions that inspire public action.


Learn more about the STEM Challenge