15 Advent Calendars Your Kids Will Adore, Including Slime, Fidget Toys, and More

If they are all about living the fast and furious life, they'll thank you endlessly for the Hot Wheels Advent Calendar ($27). The calendar contains 24 surprises, including eight speedy cars and other accessories they can put together to create the ultimate racetrack. Plus, the front panel of the calendar converts to a play mat that they can use for exciting adventures.