Normal Python Challenge Card Ideas

Ideas for challenge cards built around general Python programming — variables, loops, conditionals, functions, and data structures — outside of turtle graphics. Grounded in the block-to-text transition described in Chapter 14.

Beginning

Mad Libs Generator

Collect several words from the player with input() — a noun, a verb, an adjective — store each in its own variable, and combine them into a short silly story using an f-string. Introduces variables, input, and formatted output together. Stretch goal: ask for one more word than needed and use only some of them.

Number Guessing Game (Fixed Answer)

Set a fixed secret number in a variable, then use a while loop with an if/elif/else chain to give "too high" or "too low" hints until the player's guess matches. Combines loops and conditionals in the simplest possible game. Stretch goal: limit the player to 5 guesses total.

Simple Calculator

Ask for two numbers and an operator symbol with input(), then use an if/elif/else chain to perform the matching operation and print the result. Introduces conditional branching tied to real arithmetic. Stretch goal: handle division by zero without the program crashing.

Temperature Converter

Convert a Fahrenheit temperature to Celsius and back using the standard formulas, storing each step in its own clearly named variable and printing a labeled result. Introduces variables and arithmetic operators with a real-world formula. Stretch goal: also print whether the temperature is above or below freezing.

Countdown Timer

Use a for loop with range() counting down from a number the user provides, printing each value, followed by "Liftoff!" once the loop finishes. Introduces for loops and range() counting in a direction most students don't expect at first. Stretch goal: add a one-second pause between each printed number using the time module.

Intermediate

Word Frequency Counter

Read in a sentence or short paragraph, split it into a list of words, and use a dictionary to count how many times each word appears, printing the results sorted by frequency. Introduces dictionaries as a natural next step after lists. Stretch goal: ignore capitalization and punctuation differences between words.

Simple To-Do List Manager

Build a menu-driven program with a while True loop that lets the user add, remove, and view items in a list until they choose to quit. Introduces list operations (append, remove) inside a persistent program loop. Stretch goal: save the list to a text file so it's still there the next time the program runs.

Password Strength Checker

Write a function that takes a password string and checks it against rules — long enough, contains a digit, contains an uppercase letter — using string methods and boolean logic, returning a strength label like "weak," "medium," or "strong." Stretch goal: give the user a specific reason their password failed, not just a label.

Multiplication Table Generator

Use nested for loops to print a neatly formatted multiplication table for a number the user chooses, aligning columns with string formatting. Introduces nested loops and the difference between an outer loop's variable and an inner loop's variable. Stretch goal: print a full 12x12 table instead of a single row.

Dice Roll Statistics Tracker

Simulate rolling two six-sided dice many times using the random module, storing each total in a dictionary that counts how often each total (2 through 12) occurs, then print a simple text bar chart of the results. Stretch goal: compare the simulated results to the mathematically expected probabilities.

Advanced

Text-Based Adventure Game

Represent each location as an entry in a dictionary of "rooms," each with a description and a set of exits to other rooms, and write a while loop game engine that lets the player move between rooms by typing directions. Combines functions, dictionaries, and conditionals into a complete interactive program. Stretch goal: add an item the player can pick up and later use to unlock a room.

Hangman With Word Bank

Pick a random word from a stored list, track guessed letters in a set, and write functions that display the word's current progress and check whether the player has won or run out of guesses. Combines sets, lists, and functions. Stretch goal: load the word bank from a text file instead of hardcoding it.

File-Based High Score Tracker

Read and write player scores to a text file between runs, sorting all saved scores and displaying the top five each time the program starts. Introduces file I/O (open, read, write) as a way to make data outlive a single program run. Stretch goal: store the player's name alongside each score.

Caesar Cipher Encoder/Decoder

Write a function that shifts every letter in a message by a chosen number of positions using ord() and chr(), correctly handling uppercase, lowercase, and non-letter characters, with separate encode and decode modes. Combines string manipulation, functions, and modular arithmetic. Stretch goal: write a second function that tries all 26 possible shifts to crack a message with an unknown key.

Student Grade Book (Intro to Classes)

Define a Student class storing a name and a list of grades, with methods to add a new grade and compute the average, then create several Student objects and loop over them to print a class-wide report. A genuine first encounter with object-oriented Python, often attempted with a partner. Stretch goal: add a method that returns a letter grade based on the computed average.

Maze Runner

Create a new Python program that builds a 2-D maze on a 32x32 grid. The program first designs the maze so there and green "Start" in the upper left and a "Finish" checkered flag in the lower right. There is one guaranteed solution to the maze. When the maze is done, draw a small mouse icon that moves through the maze. A button labeled "Start" will start the mouse movement through the maze.