The first series, which is aimed at four- to five-year-olds, comprised ten episodes focusing on the numbers 1-10, in order; each episode opened with Lolita introducing herself to the viewer, and pulling the number for the episode off its string (which was hanging from the studio ceiling), then pushing it into its correct hole in a wall, and singing the main theme, "One to Ten", as each of its holes lit up in turn, which was repeated throughout the programme. In between, there were comedy sketches (mostly based on nursery rhymes and fairy tales), and animations, the most famous involving El Nombre, the Mexican gerbil who parodied Zorro, showing little Juan how to draw numbers as his four-piece mariachi band played "The Mexican Hat Dance" (and said "Again!" once he had finished, as it gave them an excuse to play again), and a sequence encouraging the viewer to spot things of the number for each episode - it was the same video, with a different number of things each time (and a recurring song, "Numbers All Around", which was sung by a group of children). Each episode ended with Lolita singing a song (or occasionally, introducing an animation), after which she would set viewers the challenge of looking for things in the number of the week's episode before saying that she would "see them next Numbertime".