Frosty the Snowman is brought to life by a magical hat, which possesses the power to give life to snowmen. The hat was originally owned by Professor Hinkle, a scientist who had been experimenting with a mysterious substance known as "magical dust." Professor Hinkle had accidentally spilled the magical dust on his hat, and when he placed it on the snowman's head, it brought Frosty to life. Frosty became a beloved character in the children's television series "Frosty the Snowman," where he brought joy and laughter to children around the world.