Most developmental play classes are better suited for babies who have longer wake windows and are able to sit up independently, typically around 9–10 months of age. For infants younger than 6 months, simple sensory play at home—like tummy time or reading—is usually sufficient. If you are considering a trial class for a younger baby, observe if the center maintains high hygiene standards, as some parents express concerns about the cleanliness of communal mats where babies sit and crawl.