HERE is the link to where you can print out a pdf of the activity. I would suggest printing it out on card if possible.
This is what is included:
A little Witch's Cat character with lots of kitchen items, some of them left blank for you to draw in your own things.
And lots of food boxes which can be cut out and constructed.
Not included in the pdf, not sure why they left them out, are a couple of other things.
Harpercollins actually made a little video showing how to make the diorama which is on twitter. This is how theirs looked at the end: