I took a few rolls and cut scrap paper out in 7 x 7 inch squares. I let the kids decorate the paper. Then I laid the roll on the paper and scored it about 1 and 5/8 inches on the bottom end and about 3/4 inch on the other. Cut the ends up to the score lines so they can be folded inside the tube on the 3/4 inch end and overlap and be glued to make a bottom on the 1 and 5/8 inch end.
Take pipe cleans and double them or wind two together to make a stem. You need them thick so they can handle the weight of the paper flowers. Cut out flower designs in different sizes (I used my Cricut) and let the kids decorate their flowers with markers, crayons or paint and colored pencils. Add a center for your flower. I used a pompom but you can use anything like cotton balls or buttons. Poke a small hole in the center of the flower and poke through a small piece of the pipe cleaner, bend it over and glue down. Then glue your flower center in place and put your flowers in their vase. : )