Here is the first one I made. Turn the switch, and it lights up.
Then align the mirror, and it beeps.
Here are all of the pieces needed. (And yes, I filled every space perfectly.)
Here is the next one. I programmed it to say "Trevor deRosier".
The 3rd one spins and lights up on a beat.
Unfortunately, I did not get pictures of the 4th one I made, but you can see a little of it in the bottom left of the next picture.
Of course, whenever you have something fun, there is always a mess.
I love Snap Circuits. The 4 sets I have, which are not all that there are, are 3D Illumination, Arcade, Light, and Extreme in that order.