Three children were injured when the mini-school bus they were traveling in flipped on its side after it was rear-ended this afternoon in Brooklyn, authorities said.

The bus, which was carrying the three kids and two adults, was driving on Stone Avenue near Bergen Street when a car behind it ran a stop sign and slammed into it at 4:30 p.m.

An employee of a nearby dollar store rushed over to pull out the hurt bus passengers.

“I pulled out three kids — they were crying and traumatized,” said the worker, Henry Pacheco, 33. “They kept calling for me to get them out.”

Two other people in the car also were hurt.

Teh injured victims were taken to both Brookdale Hospital and Kings County Hospital in stable condition, cops said.