best montessori preschool teaching near central bus stand Indo kiddzy Montessori preschool is one of the best Montessori school and our EL VIVERO kids doing climbing on the ladder activity. to climb a ladder, kids must pull themselves up with their hands and arms. This action simultaneously improves their grip, upper body strength and arm strength. improved coordination is the act of climbing requires coordination between a kids hands, eyes, arms, legs and feet.