4-H'ers can use the fair project ideas at the end of each chapter. School children can use the project ideas for science fairs. You see a tree from your view. They help an animal or plant grow. You can't see them, but they are important.
Roots also help hold a tree in place.
The trunk helps water and nutrients get to the rest of the tree. Inside the trunk there is wood. This wood acts like a straw to help keep everything moving. The branches grow and grow as a tree gets older. Branches hold leaves and help make food.