cardboard, pen, ruler, scissors, glue, pins, newspaper, paintbrush, colors and paper tubes.

To make these tubes divide a sheet of newspaper in 4 parts

and roll using a thin needle.

Paint these to get colored tubes.

From a cardboard cut 2 squares of side 6 cm.

Paste one tube each at 3 corners

and two tubes at the fourth corner.

Paste the other piece of cardboard above this.

Use pins to keep it in place until it dries.

Cut a bigger square from newspaper and cut the corners.

Paste this using glue.

Cut another square and paste above this.

Paint it and let it dry.

At one of the corners we have an extra tube.

Bend it along the edge.

Then bend the next one along the edge and so on.

If these tubes intersect in the centre then the width remains constant.

If they intersect below this then the width decreases.

If they intersect above this then the width increases.

We want the width to increase so intersection point should be above centre.

Now we will reduce the width so intersection point should be below centre.

Now we want constant width so intersection point should be in the centre.

Apply glue for the last row.

Insert this last tube below the tube in front.

Apply glue and cut extra length of tubes.