Sperms and Eggs
Crackle: OK, I have a couple of questions about sperms and eggs Mom: Uh...OK... Crackle: So, are all the sperms and all the eggs the exact same? No, right? Becuase then all the people would look the same. Mom: Well, yes, everyone is a little different. Remember we talked about DNA? Crackle: OK, but... then how do they find each other? Do they take a selfie and send it to the other one? Mom: Uh....well...hmmmm... Crackle: Never mind. They must use walkie-talkies. I bet that's how the sperm and egg find each other.