Games & Interactive Tools
13 games and 5 interactive tools for K–12, all free and all built the same way: your kid plays the process until they understand it from the inside. No account required.
Games
Firefly Jars
Catch fireflies into one jar, then catch that many more into a second jar, join them in the big jar, and build the equation yourself. Adding two groups from totals of 5 up to bridging ten, plus missing addends — 5 levels.
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Hungry Alligator
Help the alligator eat the bigger number! Swipe or tap to feed the hungry gator — earn coins to buy hats, color schemes, glasses, and more. 10 questions per round.
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Alphabet Adventure
Interactive letter recognition and phonics game for early readers. Break blocks, find letters, and sort them by sound — 35 levels of challenge.
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Number Defense
Tower defense math game for early learners. Place number towers to stop enemies — match the numbers to blast them away! Combine tiles to make new numbers.
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Number Ninja — Beginner
Build a staircase of number blocks — count up to reach the rooftop, then count down to rescue a trapped ninja. Built for kindergarten and first grade.
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Trading Post
Not enough ones to subtract? Drag a tens rod one place to the right and watch it break into ten ones, then write the crossed-out trade yourself. Vertical subtraction with regrouping, from two digits up to billions — 6 levels.
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Math Midway
Carnival shooting gallery meets arithmetic! Shoot the target showing the correct answer across 4 rooms: +, −, ×, ÷. Up to 12×12. 60 seconds per room.
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Grammar Galaxy
Mine and sort words on an alien planet! Fix grammar mistakes to launch containers into space. Covers nouns, verbs, adjectives, and punctuation.
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Type Quest
Shoot letter blocks by typing fast and accurately. 20 progressive levels — from home row basics to full sentences — with hand diagrams showing correct finger placement.
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Word Problems
Drag-and-drop math word problems for grades 3–5. Label equation components then choose the correct answer. 25 shuffled problems per session.
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Geometry Quest
3-step interactive geometry puzzles — identify area vs. perimeter, build the formula with tiles, then calculate the answer for rectangles, squares, and triangles.
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Fraction Brew
Run a chaotic potion shop! Shatter crystals into equal pieces, measure the exact fraction a customer needs, and brew it in the cauldron — bridging 4th to 5th grade fractions.
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Meteor Miner
Asteroids never arrive square. Slice one with the laser, slide and turn the pieces until they lock into a rectangular crate, then report the ore. The answer box stays shut until the rock really is a rectangle, so knowing the formula is not a shortcut. Six sectors you can assign one at a time: the first two need nothing but counting squares, and the later ones work up through parallelograms, triangles and composite figures.
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Loading Dock
Every truck backs in half loaded, so the space left over is never a tidy rectangle. Count the squares, chalk your own grid, or measure the bed and take the cargo off it — then tell dispatch how many crates fit.
Play NowInteractive Tools
Explorers, labs, and generators — open-ended tools with no score or timer.
Story Generator
Enter a topic, pick funny, serious, factual, or ridiculous — get a custom short story written at your grade level with hand-drawn cartoon illustrations.
Generate a Story
Solar System Explorer
Drag, zoom, and explore all eight planets with real NASA data on size, distance, orbital period, and atmospheric composition.
Launch
Periodic Table Explorer
Click any of the 118 elements to explore atomic number, mass, electron configuration, discovery date, and real-world uses. Navigate with arrow keys.
Launch
Interactive Chemistry Lab
Build compounds from all 118 elements, save them to your library, then mix them in the reaction lab. Watch fire, explosions, foam, and more. Live temperature, pH, and pressure readouts.
Open Lab
Civil Engineering for Kids
24-module interactive course covering bridges, skyscrapers, dams, forces, and more. Includes slides, quizzes, drawing activities, and Scratch projects.
Start CourseSummer Slide Workbook Preview
Our printable math workbooks cover the whole summer — 40 pages per grade, built around themes kids actually love. Here's a look inside.
K → 1 WorkbooksCounting, number order, addition & subtraction to 10, shapes, and more.
Build Your Workbook →1 → 2 WorkbooksAddition & subtraction to 20, place value, measurement, telling time, and more.
Build Your Workbook →2 → 3 Workbooks3-digit addition & subtraction, intro to multiplication, fractions, and more.
Build Your Workbook →3 → 4 WorkbooksMultiplication & division, multi-step word problems, fractions, geometry, and more.
Build Your Workbook →4 → 5 WorkbooksMulti-digit multiplication & division, decimals, fractions, order of operations, and more.
Build Your Workbook →Tell Us What
Your Kid Is Stuck On.
That is genuinely how everything here got made. If there is a grade or topic we have missed, we want to hear about it.