Why do children sometimes leave milk and cookies out on Christmas Eve?
Leaving milk and cookies out the night before Christmas is a tradition based on the assumption that Santa Clause will come down the chimney overnight to deliver presents and he might enjoy a snack.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Why do children sometimes leave milk and cookies out on Christmas Eve?
### Input: 
### Response: Leaving milk and cookies out the night before Christmas is a tradition based on the assumption that Santa Clause will come down the chimney overnight to deliver presents and he might enjoy a snack.