The one from my childhood was:
Why do elephants wear red toenail polish?
So they can hide in cherry trees.
Ever see an elephant in a cherry tree? See, it works!
In a similar almost identical vein,
“Why do you go around snapping your fingers all of the time?”
“Keeps the elephants away.”
“Elephants? What elephants? There isn’t an elephant with five hundred miles of here.”
“See? It works!”
That one, I’ve usually heard as “tiger-repelling rock”.
Reminds me of this one- good grownup to little kid joke:
Person 1: How do you put an elephant in the refrigerator? Easy-- you open the refrigerator door, put the elephant inside, and close the door. How do you put a giraffe in the refrigerator?
Person 2: Uh, open the refrigerator door, put the giraffe inside, and close the door?
Person 1: Wrong! You forgot to remove the elephant first!
I’ve never liked that one, because step 2 is the same as the whole task.
A Möbius strip walks into a bar, sobbing.
The bartender asks, “What’s wrong, buddy?” The Möbius strip replies, “Where do I even begin?”
The best kid joke I’ve ever found is:
What do cats eat for desert?
Mice cream
I never met a kid over about the age of 2 or 3 who didn’t get it.
None of them question what a cat is doing in the desert?
(sorry, couldn’t resist) 
mm
Maybe I should start using a voice app to respond and let the autoincorrect feature fix my errors.
The version I heard was…
Person 1: How do you put an elephant in the refrigerator? Easy-- you open the refrigerator door, put the elephant inside, and close the door. How do you put a giraffe in the refrigerator?
Person 2: Uh, open the refrigerator door, put the giraffe inside, and close the door?
Person 1: Wrong! You forgot to remove the elephant first!
then…
Person 1. The lion king invited the whole jungle to a party. Who didn’t show up?
Person 2. I don’t know.
Person 1. The giraffe, it was in the refrigerator.
Person 1. A man crossed a crocodile infested river and survived. How did he do it?
Person 2. I don’t know.
Person 1. He just swam across. The crocodiles were at the party.
What do you do with a gorilla with three balls?
Walk him, and pitch to the giraffe.
The Onion headline:
Tiger Woods completes 12-step AA program in 9
What do you have if you have a green ball in one hand and a green ball in the other?
Complete control of the Jolly Green Giant.
Well, I couldn’t vote then.
Q - Why do ducks have flat feet?
A - To stamp our forest fires.
Q - Why do elephants have flat feet?
A - To stamp out burning ducks.
This one’s a bit stale now.
What’s the difference between a golf ball and an Escalade?
Tiger Woods can drive a golf ball 400 yards.
I once confused Yakuza and Jacuzzi, now I’m in hot water with the Japanese mafia.
What’s the stupidest animal in the desert?
The penguin.
What’s the unluckiest animal in the desert?
The blue whale
When I was 5 years old a bear told me only I could prevent forest fires.
To this day, I do not know why I was chosen.
My area is so dry that during the 40 days and 40 nights of rain of Noah’s Flood, we only got a quarter inch of rain.