A walker should match your child's height, not their age. Stand them against it: the handle should sit near their hip, not their chest, so they can push rather than hang.
Look at the wheels. Rubberised wheels grip tile and wood without skidding; hard plastic wheels are faster and better suited to carpet. If your floors are polished tile, choose the slower option.
The feature parents ignore is the base width. A wider base is harder to tip, which matters more than any light or sound on the panel. Sit-and-play mode is a bonus, not the reason to buy.
Finally, check the weight. A walker you can lift with one hand is a walker you will actually take to grandma's house.
