A great practice sheet for children to revise their knowledge of fact families. The number can be written in the chimney and the families in "rooms" in the house. Doubles don't have a partner so they reside in the attic. On the first page I give an example, but the second page is completely blank if you prefer that. My students enjoy doing it at speed now with a variety of numbers (for larger numbers students just write SOME of the families instead of all of them).