Sara & Draken 2007 on netflix

A funny, exciting, and somewhat sad story about seven-year-old Sara, who accidentally strays from her class during a forest outing. She falls into an underground cave where she meets a kind dragon who makes a warming fire for Sara when she is cold. But when Sara returns to her class and tells them about her adventure, no one believes her. No one, except a trophy hunter and a strangely interested school librarian.