Okay, little buddy! When you see a bus and people are getting on or off, there are some special things the bus driver does to keep everyone safe.
First, the bus driver turns on bright red lights. These lights are like a big warning sign, saying, 'Wait! It's not time to move yet!' This helps cars and other buses know they need to stop and let the kids get on the bus or get off the bus safely.
Then, the bus driver puts up a stop sign. This sign is a big, nice stop sign that says, 'Please stop!' It makes sure that all the cars see it and don’t drive near the bus while the kids are getting in or out.
So remember, when you see the red lights and the stop sign on a bus, it means it's a special time to be careful and safe because kids are getting on and off the bus!