Amazon is selling the Red and Green Laser Star Projector for just $27.91 shipped, originally priced at $250.99. Its “red and green lasers will rotate through star patterns; the red lasers are 10mW, the green are 50mW.” Product page. Video overview after the break.
The speed of the display is controlled with a knob on the back of the unit. There is also a setting for flash on/off, with speed control. You can also set the projector to be sound-activated.