Zoombinis (1996) was neat to play through with the first 2–5 loads of Zoombinis, maybe a few hours of gameplay, but the puzzles topped out at a very easy level,

Zoombinis (1996) was neat to play through with the first 2–5 loads of Zoombinis, maybe a few hours of gameplay, but the puzzles topped out at a very easy level, so continuing to play the game to get more of the little creatures to their destination (out of a possible 40 trips or something) quickly became a time-wasting grind. I think kids would ultimately have more fun with one or more Smullyan books.