Summer Reading Program Riddles

What do you call it when there are a bunch of giraffes stuck on a street?

A gi-raffic jam!
What's gray and wrinkly and jumps every 20 seconds?

An elephant with the hiccups!
Why shouldn't you believe what dragons say?

Because they're full of hot air!
What's soft, white, and comes from Mars?

What do you get if you cross a galaxy and a toad?

Star Warts!
What does a unicorn call its father?