What's a treat for both cows and dogs?

Why don't eggs tell jokes?

What fruit makes the best gymnasts?

Why couldn't the senior feline see anymore?

Why are chemists so good at solving problems?

What did the kid say when he failed science lab?

Why do mice need oiling?

What did Polly the parrot want for the 4th of July?

Why were the atoms always hungry?

How do bunnies stay fit?

Why did the science teacher jump in the pool during summer vacation?

What's a fun hobby for an accountant?

What is the number 3's favorite day to go shopping?

What's E.T. short for?

What do you call a bear after it has eaten too much?