Bought for our daughter of 3 months, it does not yet interested in it but we had spotted the bullet's crib since all our older children who were not working yet loved that ball; indeed they catch without difficulty by one of his holes and can smoothly run it (it is light), sit on it (it is perfectly flexible), the chewing, etc. A real toy motor development safe! My daughter is 2 and a half years in the making valid also held between his teeth!