We purchased these glasses for my 6 month old last year for a trip to the beach and they worked great!  Once his front teeth came in we couldn't put them on him anymore because he would chew on the lenses and they got a few scratches on them.  Once he passed the chew-on-everything phase we started using them again.  Now 18 months, he loves wearing them again.  They're super cute and we get tons of compliments.  The frames bend easily so we don't worry about them breaking if the little guy plays with them or pulls them on and off his head.  Even though they're a little more money than some children's glasses, I highly recommend them.  Also, Julbo has excellent customer service and response time on email questions.  I will be buying the next size up for my son when he outgrows this pair and we'll use these for his little sister when she arrives.  My only wish would be that the lenses could a little more scratch resistant against tiny little teeth.