IOWA CITY, Iowa (KCRG-TV9) -- Hundreds of Iowa City third graders were on the field at Kinnick Stadium today.

They were there for the big Hy-Vee Kids Fit event. The kids were very active in the exercises this afternoon. They got to learn about nutrition and tips on how to stay healthy.

The Kids Fit program is known for its online tutorials and fitness challenges. One third grader said she enjoyed one particular challenge.

"My favorite challenge was the team challenge because I like working together with people. It just helps me out a lot more," said Lydia, a third grader at Wickham Elementary School.

Kids can visit www.hy-veekidsfit.com for more fun facts and physical fitness challenges.