I found this robot shell for cheap in china town the other day. It is plastic and cost me $9.99. Its original motion was to walk forward and flash its eyes. Not very exciting...
I added the EZ-B Robot Controller Board and some servos. The DIY robot is now remote control from my computer. You can modify a similar robot to do the same. Here are the steps :)
What You Need
1 x Plastic Robot Shell
1 x EZ-B Robot Controller (www.ez-robot.com)
1 x EZ-Builder software (www.ez-robot.com)
3 x Standard Servos (http://www.hvwtech.com/products_view.asp?ProductID=878)
2 x Modified Servos (http://www.hvwtech.com/products_view.asp?ProductID=877)
1 x Battery Pack (http://www.hvwtech.com/products_view.asp?ProductID=1206)
Hot Glue Gun
Small Screw Driver Set
I suggest watching the video first, before looking at the slide show. This will give you an idea of the order of steps. Your robot may be in a different shell, so watching how I build this robot will give you an idea of how to plan ahead. Take your time :)
Step 1: Dismantle Robot Shell
Step 2: Start Modifying Shell
I put screws at the hinge points to hold the feet steady. My robot will be driven by wheels, so i don't want the legs moving at all.
Step 3: Modify Shell With Dremel
You'll need to modify the original shell to fit your servos. I use straight cutting bits on my dremel.
I removed the battery holder. And that exposes the insides so i can fit the EZ-B board and batteries after.