Here's the refurbishment announcement on the Walt Disney World website, which also includes the kiddie pool:
From January 2026 until late April 2026, the Surfboard Bay Pool and the kiddie pool at Disney’s All-Star Sports Resort will be closed for maintenance. During this time, the Grand Slam Leisure Pool at Disney’s All-Star Sports will continue to be available. Additionally, Guests are welcome to use the other pools throughout Disney’s All-Star Resorts, including the Calypso Pool, Piano Pool and kiddie pool at Disney’s All-Star Music Resort; and the Fantasia Pool, Duck Pond Pool and kiddie pool at Disney’s All-Star Movies Resort.
From January 2026 until late April 2026, the Surfboard Bay Pool and the kiddie pool at Disney’s All-Star Sports Resort will be closed for maintenance. During this time, the Grand Slam Leisure Pool at Disney’s All-Star Sports will continue to be available. Additionally, Guests are welcome to use the other pools throughout Disney’s All-Star Resorts, including the Calypso Pool, Piano Pool and kiddie pool at Disney’s All-Star Music Resort; and the Fantasia Pool, Duck Pond Pool and kiddie pool at Disney’s All-Star Movies Resort.