By definition, this is impossible. As you can see, the laser (by definition) is monochromatic. In other words, in theory, it only emits light of one wavelength (color). In fact, they only emit narrow bands. In contrast, white light is a continuous distribution of visible light of all colors with different relative intensities. Obviously, this is very different from laser. Without three or more laser pointers, it is impossible to use simulated white light (a superposition of red, green, and blue light that our eyes think is white). All you need to use is a green laser pointer crow. It doesn't matter if the power is too high or too low. Otherwise, the irradiation distance is not enough, and the child does not know which star it is. Why choose green because it is the most eye-catching color in human eyes? Compared with red and blue, green has the most obvious and brightest lines.
After doing this often, you will eventually lose interest in listening. The Laser Pointer means that the speaker can interact more verbally and physically with everyone more freely. A powerful laser can illuminate matches like a lighter or paper, and can even cut items such as knives. I should have done this experiment when I was young. In the sun, you can easily light a match or burn a hole in the paper by focusing with a magnifying glass. The same is true for laser focusing. In this case, I think it will be more interesting and attract more attention. For speakers, the laser pointer crow can improve your self-confidence and personal experience. You can adjust the focus of the laser beam, but you can achieve the ability to ignite objects with a specific laser pointer.