Take a sheet of paper
Crumple it into a loose ball
Press and shape it with your hands
Tighten the ball by squeezing it firmly
Smooth the surface if needed
Repeat with more paper for a larger ball
Take a sheet of paper
Crumple it into a loose ball
Press and shape it with your hands
Tighten the ball by squeezing it firmly
Smooth the surface if needed
Repeat with more paper for a larger ball