I created these parts for the Insectbot Mini that is made by dfrobot.com and is available at various other electronic and robotic kit sites. This is a fun little project but the final assembly is a bit on the rough side so I decided to clean it up a bit and give it a more finished professional look. There are only two different parts that I created that need no assembly. The first piece is that back that adds addition stability to the sensors that are used for the eyes plus a place to wind the excess wires from the servos and sensor instead of bunching them up, using zip ties and letting them hang. The neck is attached at the base and is just wide enough to fit over the front servo. You can attach it with double-sided tape or glue it like I did. You will need to make two small holes to attach the sensor to for the zip ties to go through or attach the sensor with double sided tape. I would have put the holes in but I have read that there are some different sensors that can be in the kit. The second is the back that has a slot for the battery for easy removal for recharging and a platform for the circuit board so that you can easily access the pins, plugs, and micro usb port for programming. This part fits over the back sensor the same way as the neck and can be attached with double-sided tape or glued. These two parts add a great deal of functionality and a neater design to the finished product.