Do you have any grapes? If you don’t have a problem with your kids asking you this and laughing, then you owe it to yourself (and them) to listen to The Duck Song video series sung by Bryant Oden. Make sure you watch them in order because it’s much funnier that way (Duck Song 1, Duck Song 2, Duck Song 3).
This video is okay for ALL ages and kid-tested with a 4 year old and an 11 year old. They both loved it!