Arduino Robot is quite easy to create as the basic need are quite compact, needs not much of electronics . With $100 budget you can create an Arduino Robot.
People often searches with Open Source DIY Robotic Arm Kit – factually, this is Arduino like odd way of thought. If you can make a scissor to cut a paper with servo motors following a line – that is a robot.
The *Ultimate Robot Kit* great for learning robotics, Arduino and scratch programming
Thermal Printer Shield for #Arduino, ma ancora non esiste.
Learn how to send data from Arduino to Excel and plot it http://www.instructables.com/id/Sending-data-from-Arduino-to-Excel-and-plotting-it/
Many Toys For Kids Are Great to Mod & Use With Arduino, Raspberry Pi or others. Here is Robot Arm & Gripper Buying Guide For DIY Electronics.
Picture of Robot Arm Arduino App
Build a robot that avoids obstacles with the Edison + Arduino breakout http://www.instructables.com/id/Obstacle-avoiding-robot-5/?ALLSTEPS
Now You can 3D Print this Incredible Multi-limbed Robot at Home | FILACART BLOG | 3D Printing MegaStore
Picture of How to Make a Raspberry Pi Case From an Altoids Tin