Nobody ever fell in love with a spelling drill sheet, but plenty of kids will happily unscramble letters, guess hidden words and race falling ones for half an hour. Same letters, same patterns, entirely different mood, and the mood is what keeps the practice happening.
The games below each press a different spelling muscle: recalling a word letter by letter, spotting a wrong spelling among right ones, and building words from a scramble. A couple of rounds of two different games makes a complete session.