At first, was hesitant from a review below that the red ball didnt hold up but thankfuly mine arrived in perfect condition.My 8 old month son has been exploring it for 3-4 months now. At first all the balls went to his mouth, but as time passed by he started grabbing the balls with his little hands, watching them roll away and soon one day he was hitting the ball to the walland sooner the later one morninghe was hitting the red ball and the blue ball now knowing that the two balls can make sounds being content with this small discovery. After this incident he was clapping his hands!(which was sooo cute♡) Cannot forget that morning being awed.And onto 11 months, he was pushing the balls respectively with all his might (which was also so cute!!!). Thanks to this beautiful item!♡I have not teach him how to use it,but just exposed it to himand i am thankful for this beatiful sturdy item.the paint on each ball has not been chipped after all the time he munched. :0)I am writing this review after 3months of actual use.It is because i want to truly thank the seller and designer and is happy with my purchase. The beautiful jorney of discovery of seeing my first son exploring, developing, growing with this educational materialwas a blessing joy to a first time mom ♡ thank you from Asia♡