making a telescope.

Today,I made a telescope out of a card box roll by myself.The card box roll was big enough to make at least three parts of the telescope.I will show you how I did it.

Firstly,you need to draw 4 lines of different length (from longest to shortest) on a piece of card box roll. Secondly, cut them out using a penknife and finally put them together using scotch tape. That's all!!