Farmers markets start in some parts of the country during the spring. These are great field trips for kids to see fresh produce, baked goods, even plants and handmade crafts. They can talk to the vendors and find out how these different items are raised or made. Vendors almost always allow tasting, which can turn into a comparative study if two or more vendors offer similar types of produce. Some vendors sell farm-raised meat such as chicken or lamb and are happy to explain how they do this.
Taking a class to visit an actual working farm or ranch can be a great experience. Baby animals have been born and are up and around at this time of year. Baby animals are very appealing to children, as are the tractors and other equipment used. Many farmers are happy to share experiences and teach a new generation the traditions of farming and ranching. If you're close enough to a university research farm, they generally welcome visitors, especially during Ag Week and they might even have special activities planned.
A petting zoo is always a big hit with kids. Farmers and ranchers may be willing to bring a gentle animal in for the kids to get acquainted with. For kids who have never seen a horse, sheep or other farm animal up close, this can be a revealing experience. Being able to touch and smell the animals opens all sorts of ideas for kids. You can follow up with writing assignments or even photo stories.
Displays of books on agriculture and farm animals can ignite children's imaginations. Reading about and seeing pictures of farms and how they operate teach kids where their food comes from. Books like "Charlotte's Web" are always popular, as well as "Hank the Cowdog." These give accurate reflections of farm and ranch life from the animals' point of view. Putting on plays or pretend radio shows about agriculture can show how much the children have learned as well as teach others.