Parent child relay race?

Im having a party next month and trying to come up with ideas of some activities the kids and parents can do together, relay type or other as long as their fun. so far I have piggy back race, blind fold directions: Kids tell parent where balls are. and 3 legged race. The kids are 5-6 yrs old.|||Egg and spoon race, scavenger hunt, hula hoop contest.|||One I find extremely enjoyable is having the parents balance eggs on a spoon and there can be certain obstacles such as rubber balls on the ground. It would be another guiding relay race but could be fun. Also a knapsack race but could be iffy depending on the childrens' height.