My First Farm by Brio is a well-built wooden train set recommended for children ages 18 months-plus. It is an adorable toy too, that comes with a set of animals that actually make different noises when you place them in the little meadow.
All five animals can take their turns visiting the meadow by the train tunnel, and here is the slot with the speaker, where you can place them to hear their noises.
It is just the kind of toy that is perfect to attract little hands and minds. You can see the wonder on the face of your child as he or she decides what to do with the animals on their new train and little farm.