I would choose the “Stars” activity set to use in an infant classroom. This activity is suitable for infants as it encourages exploration and discovery through sensory experiences. I would set up a darkened room with twinkling lights or glow-in-the-dark stars on the ceiling to create a night sky effect. Infants would be able to explore and discover the stars using their senses, making connections between the visual and auditory stimuli. I would also provide soft, star-shaped objects for them to touch and manipulate, further developing their tactile sense. This activity would be a great way to engage infants in learning about the concept of the stars and night sky, while also promoting their cognitive and motor skills development.