Using green patterned cardstock, cut a piece to place along the bottom of the white cardstock to represent grass. Cut out several blades of grass from other green patterned cardstock. Glue the grass to the cardstock. (see photos).
Using the brown cardstock, cut out a tree trunk and glue it to the bottom center of the grass. (see photos)
Using the brightly patterned cardstock and the large hole punch, punch out around fifty circular dots. Glue the dots to the tree to look like leaves. (see photos)
If desired, glue additional dots to look like falling leaves. (see photos)
Once the glue is dry, your collage is ready to display!