Okay, so have you ever played with those toy cars that you can drive around with a remote control? Simbad robot simulator is kind of like that, but instead of a toy car, it's a fake robot that you can control on a computer!
When people are building real robots, it can be expensive and time-consuming to test them out and see if they work. That's where simulators like Simbad come in. It lets people create a pretend robot that can move around in a fake environment, which is a lot faster and cheaper than building a real robot.
Inside Simbad, there are different tools you can use to create your robot and the environment it will move around in, kind of like a video game. Once you have everything set up, you can press some buttons and make the robot move around just like it would in real life.
Scientists use Simbad to test out different ideas and see if their robot would actually work in the real world. It's kind of like doing a practice run before the big game - you get to figure out what works and what doesn't without any risk or danger.
So, in summary, Simbad robot simulator is a tool that lets people create and test robots in a computer program, without having to spend a lot of money or time building them in real life.