Susu
The sunny starter
Cheerful, adventurous, curious and kind.
Friends Together
Little moments. Colourful adventures.
Meet Susu, Yuyu and Dahdah—a world of stories, characters and new product ideas for growing families.
“fun,fun,fun, everyone, let's have some fun!”
Meet the friends
Meet Susu, Yuyu and Dahdah
Different on purpose, brilliant together. Susu invites. Yuyu discovers. Dahdah checks.
Yuyu
The playful discoverer
The smallest of the three, and the quickest to spot something new.
Dahdah
The cheerful checker
Thoughtful, cheerful, careful—and right in the middle of the fun.
Friends Together
Available now
Rainbow Train Adventures by Sunny Mello
Two editions of Rainbow Train Adventures are available. The original first edition and the enhanced second edition are available from different retailers.
Original First Edition
Rainbow Train Adventures
by Sunny Mello
- Title
- Rainbow Train Adventures
- Author
- Sunny Mello
- Edition
- Original First Edition
- Format
- Paperback
- Length
- 64 pages
- Publication date
- 21 July 2026
- Audience
- Ages 2–6
- ISBN-13
- 979-8188920340
- ASIN
- B0HBPLD1C1
- Retailer
- Amazon
Buy the Original First Edition on Amazon(opens in a new tab)
Your order, payment, delivery and returns are handled by Amazon.
Enhanced Second Edition
Rainbow Train Adventures
by Sunny Mello
- Title
- Rainbow Train Adventures
- Author
- Sunny Mello
- Edition
- Enhanced Second Edition
- Audience
- Ages 2–6
- Retailer
- IngramSpark
Buy the Enhanced Second Edition on IngramSpark(opens in a new tab)
Your order, payment, delivery and returns are handled by IngramSpark.
Upcoming products
In development — not available to purchase yet
Early ideas from our upcoming baby-care range, shown as honest concept previews and kept separate from the books you can buy today.
COMING SOON — IN DEVELOPMENT
Dahdah Teethe & Play Duo
A little Dahdah for everyday adventures. We’re developing a character teether and a separate fruit feeder, brought together in one coordinated pack.
Not available to purchase yet.
Concept preview. Final design, features and packaging may change.
COMING SOON — CONCEPT IN DEVELOPMENT
Yuyu Teething Mitt
Meet the next idea in our range: a Yuyu-inspired teething mitt with a different holding format. Its design and features are still being developed.
Not available to purchase yet.
Character preview — product design in development.
Concept preview. Final design, features and packaging may change.
Be first to hear about our new arrivals.
Leave your email for development updates and a message when availability is announced. Grown-ups only.
Watch & play
Little Clips, Big Smiles
Short character moments from Rainbow Adventure World. Nothing plays until you press play, and sound stays off until you turn it on.
Meet Yuyu
Say hello to the playful blue puppy who spots the little things everyone else walks past.
Rainbow moments
A short burst of colour, music and friendship from Rainbow Adventure World.
fun,fun,fun!
A colourful burst of rainbow fun from Rainbow Adventure World.
Free Activities
Try Our Colour, Tap & Play Sample!
Enjoy three colourful digital activities with Susu, Yuyu and Dahdah. Created for children aged 2–6 to complete on a phone or iPad—no printing or pencils required.
Download the Free Sample
This is a watermarked sample. To request the full activity booklet, please contact Rainbow Adventure World.
Request the Full Activity Booklet“fun,fun,fun, everyone, let's have some fun!”
Future possibilities
Where the Rainbow Could Go Next
Rainbow Adventure World is designed to grow with children and families. The published books are part of a much bigger character world, with future possibilities across stories, entertainment, playful learning, everyday routines, products and experiences.
Stories and Entertainment
- Stories and books
- Videos and animation
- Songs and music
- Apps and digital play
Play and Learning
- Activities and creative play
- Toys and games
- Nursery, school and library resources
- Learning through everyday discoveries
Everyday Adventures
- Clothing and accessories
- Room and everyday items
- Bath and care
- Food and mealtime ideas
- Sleep and comfort
- Travel and outdoor products
Celebrations and Experiences
- Parties and celebrations
- Events and experiences
- Character appearances and attractions
- Partnerships and licensing
For grown-ups, trade and partners
Information for parents and carers, nurseries, schools and libraries, retailers and stockists, press and reviewers, and partners and licensees—including edition details, sample pages and enquiry routes.
Follow along
Join the adventure
TikTok
Watch funny moments, little adventures and character surprises with Susu, Yuyu and Dahdah.
Follow on TikTok(opens in a new tab)Discover colourful updates, new artwork and behind-the-scenes moments from Rainbow Adventure World.
Follow on Instagram(opens in a new tab)For grown-ups
A little rainbow in your inbox
News about future adventures, book updates, activities and product announcements. Grown-ups only, and you can unsubscribe at any time.
Join the Rainbow Adventure World Family!
Sign up to receive news about new books, activities, products, special offers and adventures with Susu, Yuyu and Dahdah.