I remember watching a movie where two kids, boy and girl, follow a kite, end up in a lighthouse and in a burning cauldron. Any ideas?

A girl and boy chase after their kite
And find adventure

Possibly the animated feature
By Cruz Delgado,.

Magica Aventura (73)
Hans Christian Andersen's
Magic Adventure

Synopsis
Rough translation from Spanish
Through Google

"Tito and Tita, chasing their kite, into the woods. There they find the castle where he lives Puss in Boots, who relates how they beat the ogre for his master to marry a princess.
Children are still looking for their kite and come to a reef topped by a lighthouse. Up to it and the keeper are the adventures of a great ship, which mysteriously appeared to fight the pirates.
The light fades into the mist and children, thrown by a wave inside a cave discovered an immense treasure. Surprised by his owner, the giant Gargantua, get away, aided by the wind materialized in a kindly wizard who has found the childrens kite and returns it. But the kite is hooked on the vane of the writer's house Andersen, which shows them his latest story about a grandfather and grandson to sail to Japan and rescue the emperor's daughter, kidnapped by a dragon. A samurai strikes a gong to celebrate, but Tito and Tita are at home listening to the chimes of the clock"

more info/clip
Spanish

That is totally it!!
Thank you! Thank you! Thank you!
I saw an english version, but still.
You have no idea how much it was bothering me!?