Inside or out, encourage your child to slither like a snake, hop like a frog, gallop like a horse, or walk like a bear on all fours.
Ideally an outdoor activity, use various sizes and types of bubble wands and have kids blow their own bubbles or blow them yourself and have kids chase and pop them.
Bean bags are an easy-to-grip and throw item for kids. Indoors or out, have kids throw them into targets such as laundry baskets or hula hoops.
For more great ideas for fun physical activities check out:
https://activeforlife.com/49-fun-physical-activities-to-do-with-kids-aged-2-to-4/