The building also includes a daycare centre for infants, toddlers and preschoolers. Nearly 4,000 preschoolers attend 278 preschool groups. The main demographic is preschoolers, and kindergarteners. The motor skills of preschoolers increase so they can do more things for themselves. The program was originally part of the Playhouse Disney daily block intended for preschoolers. It focused on the study of aggression using three groups of preschoolers as the subjects. Playhouse Disney debuted in May 1997, and comprised shows aimed at preschoolers. The series is Disney Television Animation's first computer-animated series aimed at preschoolers. Sesame Street now airs on Treehouse TV, a Canadian channel aimed at preschoolers. One of the age-appropriate books recommended for preschoolers was "And Tango Makes Three". A cleft lip or cleft palate may affect the behavior of preschoolers. Some books for preschoolers include textured fabric, plastic on other materials. Among preschoolers with stuttering, the prognosis for recovery is good. Cartoonito was a programming block targeting preschoolers. Bortnick was the host of "Melody Street", a 22-minute musical-variety-show for preschoolers.