You will need a ticket to get on the Hogwarts Express to Hogwarts. Print this ticket off and use it to play or you could have a go at making your own.
I love all the detailed patterns around the edge, do you think you could do a pattern around yours?
Make a writing tray by putting glitter, sand, flour or sugar on a tray. Use a stick or a magic wand to write words in the tray.
You could try writing your common exception words to practice spelling them or you could write spells or magic words.
Make your own broomstick for your Quidditch lessons.
This website shows you how you could do it.
Follow the instructions on this website to make these Harry Potter house bookmarks.