It would appear that the contributors to Word Ways have abandoned interest in the lower orders of word squares in favour of computerized 8-by-8s and 9-by-9s. May I suggest, therefore, an original challenge to rekindle the spirit of the pure pencil and paper practitioners: Set Squares.
Word Ways: Vol. 23
, Article 11.
Available at: http://digitalcommons.butler.edu/wordways/vol23/iss2/11