I Built a 3-mirror laser Spirograph a while ago and powered it with a small <5 Milli-watt red Wal-Mart dumb laser pointer. I couldn't use this if there was any bit of light and it had to be very close to where it was being projected. I then got a 15 dollar 50 Milli-watt red laser pointer from some china website (i forgot, theres so many) online and wasn't too happy. The button broke, so I had to take the whole thing apart, and solder a wire where it is, and now the whole thing just broke (i accidentally added too many volts) so I am asking for some advice on a good site to get a laser that would be suitable for my laser spirograph. My budget is 40 dollars. What is the best laser (any color) that I can get and that would be suitable for a laser spirograph that fits my budget. I'm looking at something at least 50 milli watts.