Fun & easy indoor gross motor activities for 1 year olds, 2 year olds, 3 year olds (babies, toddlers, preschoolers too.) Gross motor activities involve movement of the large muscles, simple! Also called physical activities for toddlers, movement activities for 2 year olds, large motor activities for 3 year olds or gross motor games for kids. Great for burning off energy. They’re also screen-free rainy day, simple, easy, fun indoor activities for toddlers and preschoolers.