Seven or 7, is the Numberblock made up of 7 blocks, each a different colour of the rainbow. He has 7 lines of rainbow hair, as you can see. His powers are luck, and the ability to create rainbows from his blocks.

7 is the first odd number who is male.

7 first appears in the episode with the same name.

He is voiced by David Holt, who also voices Nine and the Numberblobs.


  • Seven (debut)
  • Eight
  • Ten
  • Just Add One
  • Blast Off
  • The Three Threes (doesn't speak)
  • Odds and Evens
  • Fluffies
  • The Two Tree
  • Numberblock Castle
  • Ten Green Bottles
  • Now We Are Six to Ten
  • Numberblobs
  • Building Blocks
  • Peekaboo!
  • Hiccups
  • What's the difference?
  • Numberblock Rally
  • Five and Friends
  • Octoblock to the Rescue
  • Ten Again
  • Flatland
  • The Legend of Big Tum
  • Mirror, Mirror
  • Eleven
  • Block Star
  • Fourteen
  • Tween Scenes
  • Fifteen's Minute of Fame
  • Balancing Bridge
  • Seventeen
  • Eighteen
  • Loop the Loop
  • Nineteen
  • Seventeen
  • Flights of Fancy
  • I Can Count to Twenty
  • Heist
  • Twenty One and On
  • Fifty
  • Sixty's High Score
  • The Big One
  • One Hundred
  • More to Explore

Total number of appearances: 44

Prototype Design

Gabe Sotillo's original design of 7 is violet (Purple) like when he first appears, but is a female and has lavender lips, dark purple heptagonal eyes, and no hair, but she likes rainbows.


  • When 7 first appears in his debut episode, all his blocks are violet (Purple). But a rainbow turns all his blocks rainbow-colored.
  • Seven is one of the few Numberblocks to appear in different colours. The other two are One and Eleven.

    7 before he gains rainbow colours.

    7's face below his top block when arranged this way, as seen in Just Add One.

  • 7 is the biggest prime number in the second part of Season 1.
  • 7 is the second Numberblock to have something on his head, which is a rainbow hair, the first being 3, wearing a red 3-pointed 2D-ish jester hat on her head.
  • The Three Threes is the only episode in which 7 does not speak, but there's a mistake that 9 sounds like him in one clip. (Weird!)
  • 7's debut eponymous episode is the only episode in which he is the biggest number.
  • 7 is the fourth Numberblock who speaks in a foreign accent, which is Welsh.
  • Just Add One is the only episode in which when 7 is arranged 1+2+2+2, his face is below his top block.
  • His voice actor, David Holt, also voices 9.
    • His voice actor also voices:
      • Some of the male Alphablocks from Alphablocks
      • Shere Khan (Disney's The Jungle Book)
      • Steggy (Harry And His Bucket Full Of Dinosaurs)
      • Kaito, Robot Tennts (Hot Shots Tennis)
      • UK version of Nick Jr. Face
  • 7 is revealed to be Gabe Sotillo's (Punchcar63) favorite Numberblock.
  • In the Cbeebies Magazine Issue 113, 7's Fact File mistakes him as a girl.
  • He can make up to 108 shapes.
    • He can make 196 one-sided shapes and 760 fixed shapes.


  • "I'm the luckiest Numberblock in the world”
  • "That was lucky!”
  • "Beginner’s luck!"
  • ''I feel lucky!''


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Seven's Fruit Face.png
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Seven says boo.PNG
Sleeping 7.PNG

Heptomino Gallery


Numberblocks characters

Discovered Numberblocks

Zero, One, Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten, Eleven, Twelve, Thirteen, Fourteen, Fifteen, Sixteen, Seventeen, Eighteen, Nineteen, Twenty, Twenty-One, Twenty-Two, Twenty-Five, Thirty, Forty, Fifty, Sixty, Seventy, Eighty, Ninety, One Hundred, One Thousand, Ten Thousand, One Hundred Thousand, One Million


Big Bad Square, The Terrible Twos, Octoblock, The Three Threes, Octonaughty, Step Squad, The Four Fours

Other Numberblocks

Twenty-Three, Twenty-Four, Thirty-Five, Thirty-Six, Forty-Two, Forty-Nine, Sixty-Four, Ninety-Nine, Two Hundred, Three Hundred

Irrational Numberblocks



Flapjack Snaffler, Blockzilla, Big Tum


Fluffies, Squarey, Numberblobs, Aliens, Rainbows, Flatlanders, Alphablocks


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