How do stars shine?

You ask: How star shine?

Star look like tiny fire hole in night skin. No. Each star is giant ball of gas, mostly lightest stuff — science tribe call it hydrogen. Star so big, own weight squeeze middle very, very hard. Middle get hot past any fire — sun middle reach fifteen million degrees. So hot, hydrogen bits smash together and stick, become new heavier stuff, helium. Each smash let out small burst of energy. Many, many smashes make huge light and heat. Science tribe call this fusion — squeeze-fire, not wood-fire. Light crawl out from star middle, then fly across space many years before reaching Caveman eye. Sun is star too, just close one. Cave wisdom: star not burn like campfire. Star squeeze tiny bits together so hard they give up light.