Toddlerhood is the age of 3-5 when child tries to practice and master gross motor skills (walking, running, jumping, throwing, etc.) suggest some activities to make gross motor development of a child fun.
At this age, kids tend to be very active and playful at the same time. You can buy skipping ropes, balls size 5 is good for training on soccer, bicycle and blocks for building toy castles, house among others.
An obstacle course is one of the best indoor gross motor workouts for toddlers who are still learning to crawl. Coordination of movement and motor control are necessary for game play.