Take a sheet of paper
Crumple it into a loose ball
Press and shape it with your hands
Keep rolling and tightening it until it forms a firm ball
Smooth the surface by pressing any loose edges inward
Repeat with more paper if you want a larger ball
Take a sheet of paper
Crumple it into a loose ball
Press and shape it with your hands
Keep rolling and tightening it until it forms a firm ball
Smooth the surface by pressing any loose edges inward
Repeat with more paper if you want a larger ball