A first picture book about wave-particle duality, for ages 5 to 9.
On a Diwali night, Dada-Bot sets up two narrow doors in a clay panel. With one door open, the light makes one bright band. With two doors open, it makes many bands. A picture book about the second idea in quantum mechanics, set in the same fictional Indian temple-town bazaar as Book 1.
Published by RSL Quantum Press, an imprint of RSL Quantum Private Limited.
Quanta is still eight years old. On Diwali night her grandfather, Dada-Bot, sets up a small experiment on the chai-stall rooftop: two narrow slits cut in a clay panel, a tray of mustard seeds, and a brass bowl of water. She learns that the same tiny thing, such as a single point of light, can behave as a drop or as a wave depending on what doors you give it. It is the second idea in quantum mechanics, and it prepares the ideas in later books.
© 2026 RSL Quantum Private Limited. All rights reserved. This book, its characters, art and text are licensed property of RSL Quantum Private Limited and may not be reproduced, redistributed, resold, used to train machine-learning models, or used for any commercial purpose without prior written permission. Trademarks: RSL Quantum, Quantum Bazaar, Dadi-Bot, Dada-Bot, Auntie Supi, Q0, Q1, Schro.
The flipbook shows all 52 pages of the review PDF as a page-turn reader. Drag a corner to turn the page, click the arrows, or use the arrow keys. A soft paper rustle plays on each flip; you can mute it below.
The PDF is the same 52-page review build as the flipbook, including the title page, colophon, meet-the-family page, glossary, parent notes, quick quiz and try-this-at-home pages.
Locked. Open the flipbook above with an access key first.
The story returns to Quantum Bazaar from Book 1. The chai stall, the brass-coin maker, the flower seller, and the small temple at the end of the lane are all here. The story takes place over a single afternoon and one Diwali night, with Dada-Bot setting up a small two-door experiment on the chai-stall rooftop.
Ages five to nine. Read-aloud for younger children. Independent reading from age seven. The English text sits at a Grade 2 reading age, with short sentences and a familiar refrain: sometimes a drop, sometimes a wave.
The recurring cast of the Quantum Bazaar Series. See the full cast page.
Main character, age eight. In this book she asks if light is a drop or a wave.
Grandfather robot. Sets up the rooftop two-door test on Diwali night.
Grandmother robot. Retired scientist. Brings the chai tray up to the rooftop.
Her cousin, same age. Fixes brass clocks and flies kites from the rooftop.
Aunt in Mylapore, Chennai. Holds the cotton sheet for the rooftop test.
The sleepy qubit. Nods solemnly on Quanta’s shoulder.
The loud qubit. Bounces with excitement when the many-bands pattern appears.
A black-and-white temple cat. She sleeps on the rooftop. She is always fine.
Strange and true. Pick a tile to flip it.
Real experiments with kitchen things.
A walking line through the wave-particle story from Newton to now.
Eight short questions from the book. Tap an answer for instant feedback.
1. Send many mustard seeds, one at a time, through one door. They pile up as...
2. Send many tiny lights through two doors. You see...
3. The many-bands pattern is the signature of a...
4. Cover one of the two doors. The pattern changes to...
5. Light is...
6. The Diwali firecracker test in the book is really the...
7. Does the same many-bands trick work with matter, like electrons?
8. The scientist who first did this with sunlight in 1801 was...
Click squares from the light (S) to the screen (O). Move one step at a time, up, down, left or right. The dark squares are walls.
Click the S square to begin.
This is the second story. The series takes a curious reader from her first qubit to a real quantum computer, one short picture book at a time, across quantum science, quantum technology, quantum electronics, quantum computing, quantum architecture and quantum computers.
All rights reserved. This work will be offered for commercial sale by RSL Quantum Press. Buying, viewing or being granted preview access does not transfer any rights of reproduction, redistribution, public display, derivative use, translation, adaptation, ML training, or commercial reuse. Educational and review quotations of up to 200 words with attribution are permitted under fair use. Bulk educational licensing, translation and rights enquiries: books@rslquantum.com.
