The three rainbows were Seven's "friends". They are Kevin, Rainbowlina, and Big Bob and appeared in Ten Again. Voiced by David Holt. They are mostly seen as an object.
A rainbow, with yellow oval eyes and yellow mouth.
- There is also an Alphablocks episode with the same name.
||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-Three, Twenty-Four, Twenty-Five, Twenty-Six, Twenty-Seven, Twenty-Eight, Twenty-Nine, Thirty, Thirty-One, Thirty-Two, Thirty-Five, Thirty-Six, Forty, Forty-Five, Forty-Nine, Fifty, Fifty-Five, Sixty, Sixty-Four, Seventy, Eighty, Eighty-One, Ninety, One Hundred
|Undiscovered / Non-physical
||Forty-Two, Ninety-Nine, Two Hundred, Three Hundred, Nine Hundred, One Thousand, Seven Thousand, Ninety Thousand, Orders of Magnitude, Compound Numberblocks
||The Terrible Twos, Octoblock, The Three Threes, Octonaughty, Step Squad, The Four Fours
||Flapjack Snaffler, Blockzilla, Big Tum, Twangle
||One Times Table, Two Times Table, Three Times Table, Four Times Table, Five Times Table, Ten Times Table
||Fluffies, Squarey, Oblongy, Numberblobs, Aliens, Rainbows, Flatlanders, Birds, What-Iffer