Bring robotics, automation, and mechanical engineering to life with the Coin-Eating Robot Kit! This entertaining hands-on STEM project allows students to build a functional robotic piggy bank that automatically responds when a coin is placed in its hands.
Once activated, the robot performs a coordinated mechanical sequence to pull the coin into its internal storage compartment before automatically resetting itself for the next coin. Along the way, students discover how motors, gears, linkages, electrical circuits, and automated sequences can work together to create responsive mechanical behaviour.
It's a fun and approachable introduction to the same fundamental concepts behind robotics and automated machinery.
What's in the Kit & How It Works
The Coin-Eating Robot Kit demonstrates how electrical and mechanical components can work together to perform an automated sequence of movements.
When a coin is placed between the robot's hands, the system initiates its retrieval cycle. Electrical energy powers a geared motor, which provides the controlled rotational movement needed to operate the robot's internal mechanical system.
A series of gears and linkages transfers this rotational motion into coordinated movement, causing the robot to draw the coin inward and deposit it into its storage compartment.
Once the coin has been collected, the mechanism completes its cycle and automatically returns the robot's hands to their original position, ready for the next coin.
Students can observe the complete process from input → activation → motor rotation → mechanical transmission → coin retrieval → automatic reset.
Investigate how mechanical components transfer and transform movement throughout a system.
Electricity & Electronics
Motors, circuits, electrical energy
Discover how electrical energy can power a mechanical device.
Automation
Sequences, cycles, reset mechanisms, cause and effect
Observe how a machine can complete a series of actions before automatically returning to its starting position.
Engineering Design
Assembly, testing, troubleshooting, system integration
Build a functional robot and investigate how individual components must work together for the complete system to operate.
Why Teachers Will Love It
Provides an engaging introduction to robotics and mechanical automation
Demonstrates how gears, motors, and linkages work together
Allows students to build a functional device with an immediate and entertaining result
Introduces the concept of input → process → output in robotic systems
Demonstrates how electrical energy is converted into coordinated mechanical movement
Helps students understand automated cycles and reset mechanisms
Encourages hands-on assembly, observation, testing, and troubleshooting
Makes complex engineering concepts approachable for younger or introductory STEM learners
Ideal for STEM classrooms, robotics programs, technology courses, makerspaces, and enrichment activities
Classroom Activity Ideas
Follow the Motion: Have students identify how movement travels from the motor through the gears and linkages to the robot's hands.
Input-Process-Output: Identify the robot's input, the mechanical process that follows, and the resulting output.
Automation Investigation: Map each step of the coin-eating sequence from activation through automatic reset.
Gear Exploration: Investigate how gears can change speed, torque, and direction of movement.
Energy Transformation: Trace the transformation from electrical energy to rotational motion and ultimately to the movement of the coin.
Timing Challenge: Measure how long the robot takes to complete one full retrieval and reset cycle. Compare results across multiple trials.
Robot Redesign: Challenge students to imagine another everyday task that could be completed using a similar motorized mechanism.
Real-World Connections: Investigate how automated cycles and mechanical linkages are used in vending machines, manufacturing equipment, household appliances, and industrial robots.
From Simple Mechanisms to Robotics
The Coin-Eating Robot Kit turns mechanical engineering and automation into a fun, memorable STEM experience. What looks like a playful robotic piggy bank is actually a working example of how electrical and mechanical systems can be integrated to create automated behaviour.
By assembling and operating their robot, students gain hands-on experience with gears, motors, linkages, energy transformation, mechanical transmission, automation, and engineering design.
Perfect as an introduction to robotics, the Coin-Eating Robot Kit helps students understand an important idea behind virtually every automated machine: receive an input, perform a sequence of actions, produce an output, and reset for the next task.
