Bug Hunt: Debugging for Kids
Every program has bugs sometimes. Learn to read code step by step, spot the mistake, and fix it just like a real programmer.
Spot the Bug!
Read each step. Find the wrong card highlighted in red.
Bug found: The robot turned the wrong way at step 3. It should turn right, not left.
Debugging Basics
What Is a Bug?
A bug is a mistake in a program that causes it to do the wrong thing. The word "bug" comes from 1947, when engineers found an actual moth stuck in a computer!
Bugs can be small (one wrong step) or large (many things working together the wrong way). Finding them is a skill called debugging.
How to Debug
Good debuggers follow a simple method:
- Read each step of the program one at a time
- Imagine or trace what happens at each step
- Find where the result changes from what was expected
- Fix that step and test again
Types of Bugs
- Wrong command: TurnLeft when TurnRight was needed
- Extra step: one too many commands in the sequence
- Missing step: a needed command was left out
- Wrong order: two correct steps are in the wrong sequence
In this tool, every bug is a wrong command at a specific step.
Real Programmers Debug Too
Professional software engineers spend much of their time finding and fixing bugs. It is not a sign of failure. It is a core part of programming.
Debugging teaches careful thinking, patience, and the habit of testing ideas. These skills help in math, science, and everyday problem solving too.