24 or Twenty-Four is a Numberblock made of 24 blocks.
Prototype Designs
Arifmetix's design of Twenty-Four is 2 shades of green (12x2) with pentagon eyes on the sides of his head and 8 clocks on his body (8x3). He has mint-green lips and limbs.
TSRITW's design is an adventurer. He once got eaten by Big Tum, but then he escaped.
PBS66Wikia's design is green with an orange border, square eyebrows, and he is 4x6.