Ключевые слова: action, age, babble, baby, black, calling, child, climbing, crawling, development, figure, first, grabbing, grow, growing, growth, human, icon, infant, jumping, learning, man, milestones, month, motor, newborn, object, old, one, over, person, pictogram, playing, process, progress, rolling, rollover, running, seeing, silhouette, sitting, six, skill, skills, stages, standing, step, symbol, talking, three, throwing, toddler, training, twelve, two, up, vector, walking, year,