Recess: School's Out (2001)

As the final school bell rings, T.J. Detweiler anticipates an idyllic summer, yet ennui soon descends. His friends' departure sparks a desperate quest when T.J. unearths a sinister scheme to eradicate summer itself. The malevolent Dr. Benedict intends to unleash a weather-altering laser, plunging the world into perpetual winter.

Faced with endless school days, T.J. rallies the Recess crew and forges unlikely alliances with Miss Finster and Principal Prickly. In a whirlwind adventure, they race against time to preserve summer for everyone. Discovering their inner heroism, the children, alongside a cast of eccentric characters, vibrant music, and sci-fi elements, transform this audacious mission into a resounding triumph for summertime joy.