Coding for Kids · Lesson

Making a Secret Number

Pick a random number.

Lesson 1 of 413 steps

Making a Secret Number is a free Coding for Kids lesson on CoddyKit. This is lesson 1 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Coding for Kids learning path, and your progress syncs across the web and the CoddyKit app. The Coding for Kids course includes 4 lessons in total.

Let's Make a Game! 🎮

Hi game maker! 🎮 We're building a fun Guess the Number game! 🔢

The computer picks a SECRET number, and the player tries to guess it! First, let's learn how to make a secret number!

print('I am thinking of a secret number... 🤫')

Random Means Surprise! 🎲

A random number is a surprise number — even the computer doesn't know it until it picks! 🎲

This makes every game different and exciting!

print('Every game will be a surprise! 🎉')

Import the random Helper 📦

To make random numbers, we need a special toolbox called random. We bring it in with import random! 📦

import random
print('Random toolbox is ready! 🧰')

Pick a Random Number 🎯

The tool random.randint(1, 10) picks a whole number between 1 and 10! 🎯 The 1 and 10 are BOTH possible.

import random
secret = random.randint(1, 10)
print('Secret number:', secret)

Run It Again and Again! 🔄

Each time you run randint, you may get a DIFFERENT number! Try running this a few times. 🔄

import random
print(random.randint(1, 10))
print(random.randint(1, 10))
print(random.randint(1, 10))

Keep It Secret! 🤫

In a real game, we would NOT print the secret. We just save it in a box for later. 🤫

Here we peek, but shhh, don't tell the player!

import random
secret = random.randint(1, 10)
print('(Secret saved! I won\'t tell the player.) 🤐')

Choose the Range 📏

Want a harder game? Use a bigger range, like 1 to 100! 📏 Want an easier one? Try 1 to 5!

import random
secret = random.randint(1, 100)
print('Secret is somewhere from 1 to 100! 😮')

A Dice Roller! 🎲

Fun fact: random.randint(1, 6) is like rolling a dice! 🎲 Let's roll!

import random
roll = random.randint(1, 6)
print('You rolled a', roll, '🎲')

Random Choice From a List 📋

The random toolbox can also PICK from a list! random.choice grabs one item at random. 📋

import random
fruits = ['🍎', '🍌', '🍇']
print('Random fruit:', random.choice(fruits))

Set Up Our Game Secret 🎮

For our guessing game, let's pick a secret between 1 and 20. Not too easy, not too hard! 🎮

import random
secret = random.randint(1, 20)
print('I picked a secret number from 1 to 20! Can you guess it? 🤔')

Surprise Master! 🚀

Now you can make random numbers for ANY game! 🚀 Change the range below and run it a few times to see surprises!

import random
secret = random.randint(1, 50)
print('My new secret is ready! 🤫')

Quick Check! 🧠

Test your random number knowledge! 🎲

Answer it in the interactive lesson

Secret Number Champion! 🎉

Awesome! 🎉 You can make secret numbers!

import random brings the toolbox 📦
random.randint(1, 10) picks a surprise number 🎲
Bigger range = harder game 📏
Keep the secret hidden from the player! 🤫

Next: asking the player to guess! ❓

import random
secret = random.randint(1, 20)
print('Game ready! Secret picked! 🎮')

Free to start

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Lessons: 140

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Frequently Asked Questions

Is the “Making a Secret Number” lesson free?

Yes — the full text of “Making a Secret Number” is free to read here on the web. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Coding for Kids course, upgrade to CoddyKit PRO. The Coding for Kids course includes 4 lessons in total.

What will I learn in “Making a Secret Number”?

Pick a random number. You practise Coding for Kids with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start Coding for Kids?

No prior experience is required. Coding for Kids on CoddyKit is structured for beginners through advanced learners, so you can start here or from the beginning and move at your own pace. This is lesson 1 of 4.

How long does the “Making a Secret Number” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this Coding for Kids lesson?

Yes. Every Coding for Kids lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

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