You need a green sheet of paper for the stem, one more paper of a different color for the flower, scissor and tape.
Make a square piece of paper from the green paper.
Roll from the corner to make a long tube. Tape it closed so it won't unroll.
Cut the other paper in half lengthwise.
Fold these two long papers lengthwise again.
Cut the folded edge in slits about 3/4 of the way across.
Tape the paper to the top end of the tube with the folded edge up. Start to roll the paper around the tube until you reach the end.
When you reach the end tape it to the tube. You can tape the second paper on and continue to roll until it is done.
Make several for a bouquet.