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Cover of Oi Duck-billed Platypus!
Picture · ages 3–6

Oi Duck-billed Platypus!

Written by Kes Gray · Illustrated by Jim Field

Book 5 of 8 in Oi Frog and FriendsView the full series

Bestseller list
Top giftableAdults love it tooEndlessly rereadable

A very funny Oi sequel built around the impossible rhyming problem of the duck-billed platypus. It keeps the phonics-friendly silliness while introducing trickier vocabulary and a satisfying exception-to-the-rule joke.

  • Best for3–6
  • FormatPicture
  • Length32 pp
  • Read aloud~6 min
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The vibe

What it’s like.

Style

  • Rhyming
  • Repetitive
  • Comedic
  • Conversational

Tone

  • Funny
  • Silly
  • Warm
  • Irreverent

Themes

On the pagerhyming words, duck billed platypus, animal seats, wordplay, phonological awareness, tricky vocabulary, animal comedy, rules and exceptions

Experience meters

Energy4/ 5
Humour5/ 5
Scariness1/ 5
Peril1/ 5
Wonder2/ 5
Cosiness4/ 5
Emotional intensity1/ 5
Conceptual intensity1/ 5

What’s it about?

The story.

Frog, Cat and Dog are back with another rhyming seating challenge, but this time they meet an animal that causes real trouble for the rules: the duck-billed platypus. Cats can sit on mats, dogs can sit on logs, and plenty of animals have neat rhymes waiting for them. But what exactly is a platypus supposed to sit on? Oi Duck-billed Platypus! stretches the series' core joke into longer, sillier and more vocabulary-rich territory. Kes Gray's rhyming text encourages children to listen for sounds, anticipate patterns and delight in language going slightly wrong. Jim Field's bright animal illustrations make the increasingly absurd pairings feel theatrical and playful. This is a strong continuation for children who already love Oi Frog and want the rhyme game to get bigger and dafter.

Fit check

Right for your child?

Where it lands by age

  • 1
  • 3
  • 5
  • 7
  • 9
  • 11
  • 13
  • Best fit · 3–6
  • Read aloud · 2–7
  • Independent · 5–7

Prose load

Minimal

Visual support

Very high

Reluctant-reader friendly

Very

Read-aloud quality

Excellent

Works well for

  • Reading aloud
  • Bedtime
  • Reading together
  • Gift-buying
  • Reluctant readers
Low sensitivityNo content warnings

Nothing in the book is likely to concern most parents. Safe to recommend without preview.

Bedtime suitability

4 / 5 · Bedtime-friendly

Sensitive-child

5 / 5 · Good fit

Graphic intensity

1 / 5 · None

Best for

  • Rhyming read aloud
  • Phonics play
  • Preschool comedy
  • Animal wordplay
  • Tricky rhymes

Avoid if

  • Dislikes silly rhyme
  • Wants story depth
  • Prefers quiet lyrical books
  • Needs low repetition

Particularly good for children who are…

  • Starting nursery or preschool
  • Reluctant reader
  • Struggling with reading
  • Starting school

In the classroom

How it works in school.

A riotously funny rhyming series built on rhyme — superb for joining in, predicting rhymes and playing with words.

Classroom role

  • Read aloud
  • Poetry and performance

Good for teaching

  • Prediction
  • Vocabulary

A book children love that happens to support school — never a stand-in for the texts a class is taught with. Reviewed for the classroom · June 2026.

Why it lands

Why they love it.

Why kids love it

The specific challenge is the impossible rhyme — what on earth does a duck-billed platypus sit on? A four-year-old gets to watch the rhyme system bend, snap, then bend back, with words long enough they have to say them carefully. The trickiest Oi, and one of the funniest.

  • Talking to animals
  • Breaking the rules safely
  • Trickery and cleverness
  • Being understood finally

Why parents love it

The Oi for a child who's mastered the earlier rhymes and is ready for the puzzle volume — long animal names, tricky sounds, satisfying resolutions. Builds genuine phonological awareness in a way that feels like comedy. The book that proves the formula can stretch.

  • Shared humour
  • Quick to read
  • Bedtime appropriate
  • Educational for adult too

In the series

Oi Frog and Friends.

8 books · open the series →

About the creators

About the creators.

KG

Kes Gray

Writer · United Kingdom · b. 1960

Kes Gray is a British author born in 1960, best known for the bestselling Oi Frog! rhyming picture-book series (illustrated by Jim Field): Oi Frog!, Oi Dog!, Oi Cat!, Oi Duck-billed Platypus!, Oi Aardvark! and more. Each book runs on absurd-rhyme animal-on-X seating-chart logic, with deliberately silly word-play that lands well on read-aloud. Gray also wrote the long-running Daisy chapter-book series (Daisy and the Trouble with Zoos, …Life, …Maggots etc.), and Eat Your Peas. His voice is gleeful, child-aligned and quietly subversive, children typically love that the books treat absurd rule-fixation as a moral universe. A reliable read-aloud author for ages 3–7 (picture books) and 6–9 (Daisy).

More from Kes Gray
JF

Jim Field

Illustrator · United Kingdom · b. 1980

Jim Field is a British illustrator born in 1980, who lives and works in Paris and has become one of the most in-demand picture-book illustrators in UK children's publishing. He is best known for his collaborations with Kes Gray on the Oi Frog! series and with Rachel Bright on The Lion Inside, The Squirrel Who Squabbled and others. Field's style is energetic, character-driven and graphic, with clean compositions and very expressive animals, instantly recognisable on a bookshop table. He works almost exclusively as illustrator rather than writer. A reliable visual signal of fun, well-paced picture books for ages 3–7.

More from Jim Field

If you liked this

Three ways out of this book.

If you liked this, try…

Lateral matches. Same shelf, different texture.

Come into this from…

Easier or preparing reads — perfect lead-ins.

Where to go next…

Escalation reads — a step up in scale, silliness, or stakes.

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Oi Puppies!

by Kes Gray

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Oi Aardvark!

by Kes Gray

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Kes Gray
Quick Quack Quentin

by Kes Gray

Where you’ll find it

On these reading lists.

Buy or borrow

Pick up a copy.

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  • Waterstones
  • Amazon UK
  • Hive
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Last reviewed · May 2026Suggest a correctionHow we recommend

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