To make a cylinder, first draw a circle on the paper, cut out two identical circles, and then calculate the circumference of the circle (the length of the side development of the cylinder).

Due to the influence of the paper thickness, it needs to be pasted when making, so the length of the paper is longer when the side is unfolded. As for the height of the column, you can decide for yourself.

Then according to the cut circle, adjust the size of the side of the cylinder and paste it into a tube shape. Finally, stick two circles. To make a cone, first cut a big circle as an edge. Start from any point on the circle, cut it to the center of the circle, and draw the two sides together to form a cone. After pasting and molding, put it on paper, trace the ground, cut it and paste it. (Note: the bottom should be bigger, otherwise it won't stick.)