I do not regret this purchase, my daughter loves !!! I offered him before his 6 months, she was not interested really, except when we, parents, using to her. From its six months however, it leaves the more, she loves shake to make noise, she seeks them when they are no longer at his disposal. My daughter's first favorite ones with the fish and the rain stick that make noise when shaken, then the one with the tiger, the image moves when the ball moves, concentrated all his attention. Today she begins to use those he must turn to make noise ... In short, these balls are great for developing babies while gripping the fun. I highly recommend !!