We started using this with my son when he was four months old. He just turned one year and still uses it. At this age, he often fusses when I put him in because then he can't crawl around the kitchen, but he gets distracted by all the toys and jumping. I do think the volume could be lower, even on the low setting. The on/off switch is in baby's reach, so he can turn it on or to the highest volume. After a while, the monkey babbling can get annoying. Overall, a great purchase.