Cool Team Pins

I coach a soccer team of 11 yr old girls and I gave them pins with our Flaming Hot Hamster logo on it. They loved the pins. The acrylic disk is light and the logo looks great. My concern is with the pin portion on the back. They weren't very well-adhered to the disk. A couple fell off when I was passing them to the girls and a couple had already fallen off in the bag. I am a little concerned that these will fall off their bags if they aren't secured with some stronger glue first. Time will tell.