Hi there! I'm happy to explain what a high tunnel is, just like you're five!
A high tunnel is like a very big, see-through tent made out of plastic or other clear material. It's usually used for growing plants, like fruits and vegetables, in a protected environment.
Imagine you want to grow some yummy tomatoes, but your backyard doesn't get enough sun, or there are pests that might eat them. You can build a high tunnel to grow your tomatoes inside.
The plastic covering on a high tunnel lets in sunlight, which helps the plants grow. It also protects the plants from cold weather, wind, and rain. So even if there's a storm outside, the plants inside the high tunnel stay safe and warm.
You can use a high tunnel to grow all sorts of things, like strawberries, cucumbers, or even flowers! And when it's time to harvest your delicious crops, you can do it without worrying about animals or bad weather ruining all your hard work.
That's basically what a high tunnel is! It's a big tent that helps plants grow better, and keeps them safe from the elements.