At this age, babies will enjoy playing with objects within reach; touching, feeling, and biting them. The shape and size of things become more interesting too. Tiny object will be visually clearer and fun to pick up.
From 9 to 12 months, babies become extremely curios about their surroundings – slamming things together to create sounds. This is also an age where babies fine motor skills are getting more refined, and where they enjoy using their thumb and index finger to pick up small objects.