The robot has 4 legs, with 3 servo motors in each leg, which give the legs a freedom of three degrees. We use a simple gait to get the robot to walk which is known as the creep gait .

We used a creep gait as its one of the simplest, slowest and yet smoothest of all gaits. At first we just get the robot to walk forward, back, left, and right and then we add cooler features such as obstacle avoiding and Bluetooth control to take it to the next level.

Sr.No	Components or parts used Electronics / Mechanical	Mechanism/working principle identified	links
1.	Arduino	Arduino boards are able to read inputs - light on a sensor, a finger on a button, or a Twitter message - and turn it into an output - activating a motor, turning on an LED, publishing something online.	https://www.arduino.cc/en/Guide/ArduinoMega2560
2.	3 and 4 mm thick clear acrylic	for the body and legs of the bot	https://en.wikipedia.org/wiki/Poly(methyl_methacrylate)
3.	servo motors	It is tiny and lightweight with high output power. This servo can rotate approximately 180 degrees (90 in each direction), and works just like the standard kinds but smaller.	https://goo.gl/HyaBLC
4.	a servo shield	It lets you drive two DC motors with your Arduino board, controlling the speed and direction of each one independently.	https://store.arduino.cc/usa/arduino-motor-shield-rev3
5.	Holder	A battery holder is one or more compartments or chambers for holding a battery. For dry cells, the holder must also make electrical contact with the battery terminals.
6.	ultrasonic sensor	for obstacle avoiding	http://cmra.rec.ri.cmu.edu/content/electronics/boe/ultrasonic_sensor/1.html
8.	IR sensor	IR sensors are used to detect obstacles and sense the size
9.	2 AA batteries	power supply
10.	Bread board	A breadboard is a platform you can use to build and test electronic circuits, usually without having to do any soldering. Certain parts of the breadboard are wired together so that electricity can flow from component to component in orderly	https://www.techwalla.com/articles/the-functions-of-a-breadboard
11.	female headers and male headers	Pin header connectors comprise several different means of connection	https://learn.sparkfun.com/tutorials/connector-basics/pin-header-connectors
12.	laser cutter	to cut acrylic sheets

Calculate cost estimation of the existing solution

It might cost upto Rs 3800

solutions for the given problem

1. Based on the weight of other bots and the weight that a student can easily carry, so the bot's weight must not exceed 1500 grams.
2. The bot is most suitable for students of age group 10-15
3. Based on the cost of competing products in the market, the cost of the bot will be around 3000 Rs.
4. At the age of 13 the students will be able to recognize different bone mechanisms of animals, The bot must include diversity in the way the bones are arranged for walking.
5. Materials used must be safe and student friendly because students tend to mishandle the bot.

resouce: https://www.youtube.com/watch?v=LB8VLnVpoPY&feature=youtu.be https://youtu.be/zbypz0VfjRc