K is the 11th letter in the Alphablock gang. He is C's older brother.
K is voiced by David Holt in the UK.
- K is a yellow block wears a green jersey and shoes.
- He likes to kick his football.
- Alphablocks (first appearance)
- Why (cameo)
- Race (no words made)
- Fox (sound only)
- Magic (sound only)
- Up (cameo)
- Hill (sound only)
- On (sound only)
- ABC (only speak name)
- Little Red N
- Thing (sound only)
- The End (no solo lines)
- Clap (sound only)
- Mine (sound only)
- Birthday Girl (latest appearance)
- He is 1 of 2 Alphablocks to have a younger sister, the other being D.