Nell & Key The book

A storybook your kid can interrupt

A book that grows with you.

We're building a living illustrated book where children explore ideas through stories, shape what happens next, and carry their discoveries into everyday life.

A concept image of the first chapter: a book page reading The busiest little shop beside a small voxel lemonade stand with a queue of customers, a shopkeeper, and a cash drawer.
Concept preview The words and buttons in this picture are part of the picture. The chapter itself is playable: open it.
01

Step into a story. Change what happens. See what you discover.

Step in

A character looks up.

Ask Sam where the money went, and Sam opens the drawer and shows you.

Change it

The afternoon plays again.

Choose a different plan, and the same twelve customers come back to test it.

Discover

The book remembers.

What changed is explained with the real numbers, and what you tried is kept.

02

The first chapter.

Playable now

The busiest little shop.

Sam's lemonade stand is never quiet, and yet at closing time there is hardly any money in the drawer. Follow the money, find the drinks nobody bought, and replay the afternoon with a different plan.

  • Open the cash drawer and see where twelve dollars went.
  • Find the six drinks left on the counter, and why they are worth nothing tomorrow.
  • Make 6, 12 or 18 drinks and run the same afternoon again.
  • Give a drink away, if you decide that is the point, and see what it costs.
  • Then one more afternoon with less help, kept as its own observation.

No account needed. Your reading is kept on this device, and a parent entry is written from what you actually did.

The same concept image, cropped to the lemonade stand.
03

Little discoveries, kept together.

Every chapter a child reads adds a short entry to a parent's book: the plan they chose, the questions they asked, the exact result, the help they were shown, and what they said they would try next. Nothing is guessed at. Each sentence points at the moment it came from, so you can see exactly what it rests on.

An entry will say “after seeing where the first day's money went, chose fewer drinks for the next day”. It will never say “has mastered profit”. What a child did with help and what they did with less of it are kept as two different observations.

Every entry ends with a question you can ask at the table. Your child knows the answer and you do not, which is the point.

Example, not a real child

Thursday 10 September

A different plan for Sam's shop.

Nell chose to prepare 12 drinks for the replay. The last run ended with $16 in the drawer and 0 drinks left, compared with $12 and 6 left in Sam's own attempt in the story. Before running it, Nell predicted the drawer would hold more than Sam's, and it did. Nell opened the cash drawer and the leftover drinks, then opened the explanation of why the result changed.

Help shown: Sam opened the drawer (asked for), pointed out the leftover drinks (asked for), explained why the result changed (asked for).

With less help

Told that tomorrow only 9 people come, Nell chose 6 drinks. It closed with $14, 0 left and 3 people without a drink. Nothing was opened or explained for this one.

Ask together: “What might change if more customers came tomorrow?”

Written from e3e4e5e6e7e8e10e11

04

Where this is going.

The aim is a child who becomes more able to think, decide and make things on their own. A book that grows with you should eventually be able to draw on the things a family chooses to share: an interest, a question from the kitchen table, something coming up at school. A situation becomes a small story to rehearse inside, with quantities you can inspect, a character who listens, and rules a child can read and question. That is the direction we are building toward. Today there is one chapter, and it works.

Be first to read it.

New chapters arrive slowly and on purpose. Leave a name and an email and we will write when the next one is ready.