Knock knock Jokes from a Five-year Old

5 y/o son: "Knock knock." Me: "Who's there?" 5 y/o son : "Larry." Me: "Larry, who?" 5 y/o son : "Larry who goes to the potato store and buys a potato!" (Mad cackling) - - - - 5 y/o son : "Knock knock." Me: "Who's there?" 5 y/o son : "Chicken." Me: "Chicken, who?" 5 y/o son : "Chicken who goes to the potato store and buys a potato!" (More cackling)