Most children with The Williams Syndrome have mental retardation. In young children this is a disadvantage on motor development in the field. They reach a little later than usual milestones such as walking, talking and be clean. Especially when the school is often combined with weak concentration of activity, a problem. In the field of language and speech, long-term memory and social skills of children performing well. Many children experience fun listening to and working with music. The children have a good sense of rhythm and tone and they are all fast songs. In other areas such as fine motor skills, coordination of movements and spatial understanding their performance is weaker.