It's sunny today. Linda and her friends have a picnic(野餐) in the park. They are very happy.
Linda: What do you have, Tim?
Tim: I have some biscuits, cakes and water.
Kitty: I have some ice cream and apples.
Joe: I have a big watermelon. Do you like it?
"Sure!" They say, "Let's have our picnic now!"
—It is________.