The study considers the potential opportunities and features of using the Web-service LearningApps.org in the for- mation of foreign-language activities of 6-7-year-old children in English classes. The classification of types of tasks on a functional basis (Multiple-choice, Sequence or Pairing, Order, Filling in, Group Puzzle, Crossword, Word grid, Patring Game and ect.) is carried out. A brief description is given. A strategic analysis of the Web- service LearningApps.org in the formation of foreign-language activities of 6-7-year-old children is presented. A set of methodological, didactic, pedagogical and psychological principles, which is implemented in the process
of using Web-services LearningApps.org in English classes, is described. Didactic possibilities of formation foreign-language activities of 6-7-year-old children in English classes are considered. Among them: activation of children’s vocabulary, formation reading skills and abilities, improvement of children’s written speech, development of basic speech skills: listening, speaking, practicing children’s use of grammatical forms, stimulation of children’s word formation. Emphasis is placed on the effectiveness of using the Web-service LearningApps.org for the development of critical and creative thinking; formation of communication skills, in particular: analysis of material, comparison, comparison, establishment of associations; development of logic of sequence of actions and decisions, ability of systematization and generalization of material; teamwork skills in the process of solving problems. Fragments of own development of interactive exercises in the Web-service LearningApps.org aimed at studying lexical units, grammatical skills, listening and consolidation of the studied material by the topic «Parts of body. Appearance» are presented.