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Cover of Oi Cat!
Picture · ages 3–6

Oi Cat!

Written by Kes Gray · Illustrated by Jim Field

Book 3 of 8 in Oi Frog and FriendsView the full series

Bestseller list
Top giftableAdults love it tooEndlessly rereadable

The third core Oi book gives Cat the problem: cats sit on gnats, and Cat is not happy about it. It keeps the rhyme-machine comedy going while adding a clear fairness-and-protest hook.

  • 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 pageanimal seats, rhyming words, wordplay, cat, phonological awareness, animal comedy, gnats, unfair rules

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.

According to Dog, every animal must sit on something that rhymes with its name. Frogs sit on logs, dogs sit on frogs, and now cats are supposed to sit on gnats. Cat is not impressed. As the animals work through more and more ridiculous rhyming combinations, Cat tries to find a way out of a deeply uncomfortable rule. Oi Cat! is another bright, silly, join-in picture book from Kes Gray and Jim Field, full of satisfying sounds, visual jokes and escalating animal absurdity. The formula is familiar by this point, but that is part of the pleasure: children know how the rhyme game works and can anticipate, correct and laugh along. It is particularly good for building confidence with rhyme while still feeling like comedy rather than instruction.

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
  • Join in story

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
  • Starting school
  • Struggling with reading

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 delight is Cat's protest — by book three the children reading know the rule (cats sit on gnats), and Cat refuses to accept it. A small child gets to side with Cat against the system. The first Oi where the joke gets a hint of rebellion.

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

Why parents love it

The Oi where the rule-game gets a fairness twist — Cat objects to her impractical seat, and the rhyme game becomes briefly a negotiation. A useful early read for a child who's starting to notice when things aren't fair. Same airtight rhyme as the rest, with a tiny moral hook.

  • 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.

Buy or borrow

Pick up a copy.

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Last reviewed · May 2026Suggest a correctionHow we recommend

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