I have used this tool to do the comic task. I liked it a lot because of the amount of scenes, characters and prompts you can choose from to create the story. Indeed, I have already created a Halloween story to work with students.
PIXTON: The most powerful and easy to use comic and storyboard creator I've been able to find. It is a bit limitted in characters and costumes but you can change their pose and expression...You can play with them like with puppets!!!
PIXTON. An amazing free web tool which allows you to create wonderful comics easily. It is a greeat tool to work literacy in CLIL with students and, depending on their grade, they will be able to create their own comic and printed. In that way, they will be learning the language by using it.