Let's pretend you have a toy with the picture of a butterfly on it. If you turn the toy around in a circle, there are some positions where the butterfly looks exactly the same as it did before you started turning it. This is called "rotational symmetry." It's like a magical trick where the butterfly can spin around in a circle and still look the same as it did before.
The number of times you can turn the toy around and have it look the same is called the "order of rotational symmetry." So if you can turn the toy around 4 times and have it look the same, then it has an order of rotational symmetry of 4.
Things that have rotational symmetry are super cool because they look the same from many different angles. They are also used in art, design, and even math!