Bless your heart, Kriston, that looks perfect! (I knew I could count on you!!) The times tables really annoy Harpo--we've gone some other directions (math history, computational linguistics and other kinds of puzzles, Don Cohen's little calculus books)--but every time I try to circle back to multiplication, it gets ugly. Geometry sounds like an excellent solution--thanks so much for the idea, and for the recommendations.

peace
minnie