is the youngest kid in town, as well as being the most energetic. He has problems with eating too much candy and not eating the right food, but he's always full with energy, mainly brought on by a sugar rush, and desires to be like Sportacus
Ziggy is the youngest person in LazyTown and has a bit of an obsession for candy, carrying around a giant lollipop with him almost everywhere and even having one next to his pillow when he sleeps at night. His consumption of large amounts of candy can cause him to become quite hyper and which starts to annoy others around him while on his sugar high, but he has a big heart. Since he has a lot of energy, he's always trying his best, even if he actually can do something or not. While he does have good intentions, a little mistake makes him feel depressed, but he always makes a quick comeback, thanks to encouragement from Sportacus. He has a lot of insecurities, because he doesn't know actually what he's good at, but at the same time, he desires to become good in everything, and that is the thing the people of LazyTown, and especially Sportacus, like about him best.
Much of Ziggy's development, appearance wise, was making his character more distinct from Superman, who he was initially based on. In Áfram Latibær, the resemblance is the closest, down to having Superman's distinct haircut, black with a curl on the forehead, and an S (for Siggi) in the diamond on his shirt. Unlike Superman, he has blue trainers with yellow, rolled up socks, reflecting his childish personality. His shirt is also several sizes too small for him, and he has a prominent gut showing.
In Glanni Glæpur í Latabæ, he receives an updated appearance. He now has blonde parted hair, similar to his final design. The diamond on his shirt has been replaced with an empty yellow triangle, likely to avoid copyright infringement with DC. He still has a visible gut, and the original Ziggy puppet and promotional art surrounding the play depicting him as exaggeratedly overweight.
The second puppet used in the unaired pilot introduces traits that are present in the final design. He now dons his signature lollypop and wears a white undershirt that covers his belly. The blue over shirt now features a large, yellow Z (for Ziggy) on it. The final puppet features further alterations. He has lost a lot his weight, which is now mostly depicted in his chubby cheeks. His haircut is also more prominent, and his cape is lined with blue and white stripes on the inside, which match the red ones on his lollipop. The proportions of his face are also altered, as his eyes, which were formerly drawn large, are now the smallest of any of the puppets, and he now has freckles.