0 1 First, prepare a lot of balloons, blow them into almost the same size, and tie a balloon to each balloon.

Use a long rope to tie the roots of the two balloons firmly, keeping a good distance, not too tight, so that the third balloon can't be tied again, and the rope will not look good when it is exposed. Tie a group of balloons with proper tightness.

In the same way, make more groups of balloons and tie each group of balloons on a long rope.

Prepare an arched shelf, fix multiple groups of balloons on the arched shelf, and decorate the balloon string.