This was my first Picaxe project. Actually, my first complete circuit to design and build. The hardest part of the project is the soldering, but if I can do it you can do it.
Basically, it is a little box with a push button and two light sensors (3 inputs). It has an LED and piezo (2 outputs). I have it programmed to respond to light levels with corresponding beeps and blinks. It can be reprogrammed to respond differently. I "play" it by shading the two photoresistors with my hand. It is quite addictive.
If you like circuits and programming, and if you are just getting started in either, this is a good project for you.
Video 1 (Sorry, these are hosted at DivShare. It's slowww.)
Step 1: Materials and Tools
8-pin dip socket thingy http://fwd4.me/0woR from Radio Shack or similar)
Project Box (I used a thrift store computer speaker $.75)
Light Dependent Resistors X 2 (light sensors or photo resistors as they are often called)
LED (two if you want, I'll explain later)
Peizo (I salvaged one out of an old computer, sometimes they are in greeting cards, toys or novelty ties)
Push button, the momentary kind (I salvaged one out of an old computer power button)
Toggle switch (to control the power!)
Wire (I used 22-gauge. But you can use smaller wire as long as it is insulated and flexible. Solid core is easier for soldering. You don't need much. I actually salvaged a lot of it from, you guessed it, an old computer.)
5V regulator (http://fwd4.me/0woS from Radio Shack or similar)
9V battery with battery cap or holder (I think you could also use 3 1.5V batteries) Scavenge old broken toys and electronics.
Soldering Iron (solder, helping hands, magnifying glass, etc.)
Hot glue gun
Razor knife and other cutting tools
Drill with small bits (depending on your project box and design)
Small gauge Wire stripper/ cutter
Serial adapter cable OR USB serial adapter cable
Pixaxe programming software