Libraries

Shush.
There's a dragon in Biography.

Hang QR codes on the shelf ends. A phone's camera opens each one as a card — a riddle only that shelf can answer, a merchant, the dragon. One leaderboard runs all summer.

Build a trail for free

Your first 5 players are free, no card. Then $1 a player. Buying for a library system? Write to us

  • No app to install
  • No name or email asked of a child
  • Wi-Fi or a signal at every code
  • One phone per team
The Stone Sentinel's monster card: its vitality, attack and defense, the points and coins a win pays, and the Leaf of Sun it guards.

A monster card from a real trail. Beat the sentinel and the Leaf of Sun unlocks — your dragon waits for the sword the same way.

Built for a branch

Hang the label holders once

Next season, print a new story and slide it into the same holders — you change the labels, not the furniture.

The catalog is the puzzle

To answer a shelf's riddle, a team has to pull the book and read it — which is the thing you wanted them doing anyway. The dragon in Biography won't fight a team that hasn't found the sword in Reference.

No library card, no account, no email

A grown-up ticks the terms box and the team plays under a name Eggtrail picks for it. No date of birth, no personal data to consent to, and nothing for your branch to store.

What Eggtrail keeps, in full

You see the dead codes

A staff page lists every code by when it was last scanned, so a label a toddler peeled off in week two shows up in week two.

Three steps to the first scan

1

Pick a story, or write one

A ready-made story takes 10 minutes. For riddles about your own shelves, describe the branch to the AI assistant you already use — about 30 minutes, one conversation.

2

Print and mount

One PDF holds every code and a key to what each one opens. Before you mount a code in a far corner, check that a phone gets a signal there.

3

Readers scan and play

Teams scan, read and duel their way up the leaderboard. You watch it from the desk.

Build a trail for free

What librarians ask

$1 (1 Gold Egg) for each player you expect, and a player is one phone: a family sharing one counts once. A summer of 100 families comes to $100; each family past your count adds $1 as it joins. Riddles about your own shelves are cards of your own: $1 a card, art included. A new season, or a leaderboard you reset, is paid on its own. Gold Eggs come in packs, paid once — never a subscription.

Yes. On a story of your own, one press records every card's description in a synthesized voice, in the story's language when that is English or Spanish. The card shows Hear this card and the child presses play — nothing plays by itself in the stacks. The story is then marked Made with AI.

Yes. A trail runs in English, Spanish or German, and you write the story in whichever you choose.

No. Write the story once and build a trail from it at each branch, with its own codes and its own leaderboard. Each trail pays for its own players.

Put a story in the stacks

Your first 5 players are free, no card. Then $1 a player. Writing your own story? $1 a card, art included.

Build a trail for free Write to us