So far that day, Julia and Robbie had finished their homework, watched television, cleaned their rooms and had soup and sandwiches for lunch. Julia was now setting up the checkerboard, separating the black and red checkers. But she didn't really want to play a game. She looked through the window again.
"Why don't you two go outside and watch for your father?" their mother asked.
"I don't know. It looks too cold out there," said Julia.
"You just need to dress in layers," said their mother.
"Like a cake?" giggled Julia.
What their mother meant was that they could stay warm by wearing several layers of clothing. For example, the twins could wear a sweater on top of a T-shirt and then put on a vest and then a jacket. Mittens are also warmer than gloves, their mother said, and they need to wear a hat.
"If it's really cold, a scarf to cover your mouth is good to protect your lungs from the cold air," their mother added.
"Let's go," shouted Robbie. Julia agreed.