You could probably get away using a 5mw laser just for that. 30mw is not a good thing to use with kids about. I don’t think much of this project. Seen it lots of times in different shapes and forms.

Jean Rousseau’s laser-engraving service allows customers to share a ... children’s drawings, ... After about 10 seconds of rapid back-and-forth movements from the laser beam acting as ...

This laser shadow behaves like an ordinary shadow in many respects. It follows the shape of the object (the green laser beam) and conforms to the contours of the surfaces it falls on. The team also ...

Physicists have built a tractor beam out of lasers that can both repel and attract objects across distances 100 times farther than previously possible.