Here you have a funny way to learn the different parts of a plant.
The idea is to make a foldable plant following these steps:
1) Draw a plant and fold the sheet in half.
2) Cut flaps to separate the flower, the leaves, the stem and the roots. You have to cut only the first layer!
3) Open your foldable and label it. To label it, you can use this document.
Here you can see some foldable plants, made by 1 ESO B students, in class of Natural Sciences.