It may be a while before your tiny tyke becomes a pro at Sudoku, but these knobbed puzzles from Kid O make it easy for burgeoning problem-solvers to put the right pieces together. Made from sustainably harvested wood and nontoxic paints, the puzzles are designed to help children hone their shape- and color-recognition skills, whether it’s through matching up a litter of cats or reuniting a passel of barnyard animals.

+ Cats $14.99; Farm Animals $14.99

+ Kid O