For this study of the influence of the diameter of implements on children's drawing products, performances, and preferences, toddlers and preschoolers were observed while they drew with primary (larger-sized) and standard markers, pencils, and crayons. The relationship between drawing and early home manipulative experience was also investigated. A total of 20 children were observed while they completed spontaneous drawings, geometric form copying, and tasks involving the drawing of a girl or a boy. The tasks were taken from the Riley Preschool Developmental Screening Inventory (1969). Findings revealed that levels of symbolic representation in free drawings, geometric forms, drawings of boys or girls, and handgrips, were similar for primary and standard instruments. More children claimed to like the standard instrument than to dislike it. Early home manipulative experience, including buttoning, cutting with scissors, coloring and drawing, and building with Duplo or Lego materials, was related to children's more mature drawing products and performances. It is concluded that results confirm findings of previous studies that indicate that even very young children are able users of standard drawing instruments. (Author/RH)