Thermos joke for kids

A woman was shopping at Walmart and came across a shiny silver thermos.

 She was quite fascinated by it, so she picked it up and brought it over to the clerk to ask what it was.

 The clerk said, "Why, that's a thermos. It keeps hot things hot and cold things cold."

 "Wow," said the woman, "that's amazing... I'm going to buy it!" So she bought the thermos and took it to work the next day. Her boss saw it on her desk.

 "What's that?" she asked.

 "Why, that's a thermos. It keeps hot things hot and cold things cold," she replied.

 "Wow, that's amazing," said the boss, "what do you have in it?"

 "Two Popsicles and some coffee."