Children under 3 are enthusiastic users of mobile devices and have the ability to emulate a number of the gestures adults use on touch screens, according to the literature on Child-Computer Interaction (CCI). Nevertheless, relatively few studies have focused on the spontaneous interaction of children with screens. The objective of this empirical research is to study unstructured interactions of children under 3 with two apps that permit free drawing and coloring. Observation includes the first gesture used for interaction and the use of on-screen tools (e.g. color palette).