Ключевые слова: 1, aim, aiming, arm, arrow, background, boy, caucasian, child, communication, count, counting, cursor, direction, finger, first, gesture, gesturing, hand, here, human, index, isolated, kid, learning, little, mathematics, middle, number, one, open, part, people, person, point, press, push, reaching, school, show, showing, sign, something, symbol, touch, up, wall, warning, white, wrist,