Mixmonde: hatch hybrid animals with math

A math adventure game for kids aged 6 to 13. Explore worlds, solve story problems and hatch animals that are a mix of two real ones. Built on the US grade 1 to 7 standards and the Singapore Primary 1 to 6 math syllabus. Every grade is free while Mixmonde is in beta.

How it plays

1. Meet a character. Wander a world and find someone guarding an egg. They have a story problem for you.
2. Solve their problem. Miss once and you get a tip that uses that problem’s numbers. Miss twice and you see it worked out.
3. Carry the egg home to the incubator on your farm.
4. Warm it up by solving Nana Rosa’s problems until it’s ready.
5. Hatch and guess. Where does it come from? Which two animals is it? Then give it a name.
6. Feed, grow, dress up. Spend Sparks on food and upgrades, and win outfits with math challenges.

Problems are read, not raced: no timers, and a wrong answer costs time, never lives.

Six worlds in every grade

• Grade 1 (numbers to 100, adding and subtracting to 20 and to 100, length, time and graphs, shapes and equal shares, equal groups and money): Mexico, Scotland, Costa Rica, Norway, Maldives, Kenya.
• Grade 2 (numbers to 1,000, adding and subtracting to 1,000, multiplication and division, fractions, measuring and graphs, time, money and shapes): Oman, New Zealand, New Guinea, Patagonia, Philippines, Zambezi.
• Grade 3 (numbers to 10,000, multiplication and division, fractions, area, perimeter and shapes, measuring and graphs, time and money): Egypt, Japan, Madagascar, Lapland, Hawaiʻi, Okavango.
• Grade 4 (big numbers, factors and patterns, fractions, measurement and data, lines, angles and shapes, decimals): Outback, Andes, Borneo, Alaska, Galápagos, India.
• Grade 5 (place value and decimals, expressions and patterns, fractions, measurement and data, geometry, ratio, rate and percent): Morocco, Himalayas, Amazon, Siberia, Reef, Serengeti.
• Grade 6 (ratios, rates and percent, fractions, decimals and factors, negative numbers and coordinates, expressions and equations, area, volume and circles, statistics): Gobi, Alps, Congo, Rockies, Belize, Pantanal.
• Grade 7 (proportions and percent, rational numbers, expressions and equations, scale, angles and solids, sampling and comparing data, probability): Namib, Iceland, Sumatra, Kamchatka, Fiji, Kruger.

For parents and teachers

Every wrong answer maps to a named misconception, so the grown-ups’ dashboard shows where your child needs help and why, with tips to try at home. Kids never see prices or ads, and we never sell data.

About us

Mixmonde was started by a parent whose daughter, a fifth grader, was having some trouble with math, so he began building a game for her. She has been playing it while we build it, and she’s been doing really well. We want to help kids, as many as we can, and we’d love your feedback at hello@mixmonde.com. Software like this has to pay its developers, the people who maintain it and the servers it runs on, but if your family can’t pay, just write to us. We’ll sort it out.