To build a home laser maze

My friend and I are aiming to build a home laser maze.
We are interested in your laser maze kit* (maybe augmenting it with additional hardware too). We are novices, and this kit looks very helpful! But we have some questions/concerns.
In familiarizing ourselves with recreational lasers for this project, the big concern that keeps coming up for both of us is: safety. And it’s been hard to find manufacturers that provide sufficient product details regarding safety & proper guidelines for use. Feels a little Wild West.
So, we are hoping you can tell us the following about your laser maze kit*: (1) the power (mW) of the laser provided, (2) recommended safety precautions (age minimum, eyewear, etc), and (3) if any certification of safety is provided with the kit.