You will need 2 Toilet paper rolls per flower, a wooden dowel some paint and glue.

Cut four circles, 2 different sizes from the toilet paper rolls. I used the scraps to cut leaves (Not pictured) Poke a hole in the center of each, just big enough for the dowel to go through. Draw lines so you have 6 wedges. kind of like a pizza. Cut down each line CAREFUL NOT TO GO ALL THE WAY TO THE HOLE IN THE CENTER. Then round the wedges like petals. You can paint them after they are assembled, but I found it easier to paint at least the base coat now. Glue one of the small circles to the dowel and glue all the petals upward. Add the second small round piece. You will find that the cardboard is pretty pliable and you can bend the petals. Add and glue the 2 larger petal circles. Add some leaves to the stems and your done. Yea I know the leaves look more like carnation leaves then rose leaves but these were easy and I liked them.