A personalized storybook for ages 3–8

Your kid.
Their first step on Mars.

Mars Fever turns your child into the hero of a beautifully illustrated journey to the red planet — name, face, and all — with real Mars science tucked into every page.

Mars Fever book cover: a small astronaut standing on a cardboard rocket in a backyard, looking up at Mars

The neighbors say Mars is no place for a kid.

The neighbors are about to be proven wonderfully wrong. Your child catches Mars fever on a Tuesday, builds a rocket out of a refrigerator box, waits for the once-every-26-months window — and goes. Fourteen spreads, gentle choices that make every re-read different, and the quiet, homesick middle of the voyage that every future astronaut should know about.

A child at their bedroom window at night, watching a red dot in the sky — The catch

A cardboard rocket launching from a backyard at night — The window opens

A small astronaut stepping onto untouched Mars sand — The first step

REAL MARS, ON EVERY PAGE: a Mars day is 24 hours and 39 minutes — so a kid on Mars gets 39 extra minutes of playtime, every single day. Facts checked against our own Mars research compendium, editorial disputes and all.

Made by you, made about them

Build your explorer in the character creator — hair, skin, freckles, glasses, favorite color on the mission patch — and watch them appear in the helmet visor on every page. Everything happens on your device: no accounts, no uploads, no data collected. Ever.

VOL 1 The Window — the fever, the rocket, the launch, the first step FREE, COMPLETE
VOL 2 The Red Playground — what jumping means in one-third gravity
VOL 3 The Dust Storm — when the whole sky turns to weather
VOL 4 The Two Moons — Phobos, Deimos, and who guards the guards
VOL 5 The Long Way Home — because the best explorers come back

The neighbors say Mars is no place for a kid.

Made by you, made about them

Mars Fever is coming to the App Store