Hk disneyland with 18m old and 70+ year olds

Hi! What rides or shows can we see as a family with a toddler and grandparents (18m old to 83 year old). If we go next week, will it be crowded on weekdays? Whats the easiest way to watch the momentus show where its not too crowded? My son cant walk yet so everything needs to be stroller friendly and he can sit on my lap? Whats the best buffet?