They make markers and paints for glass.
I think they have like a how to video at Michael's
Michaels personnel can definitely help and there are craft kits and books available too.
I have been doing these the last 2 Christmases.. I just got some paint markers.. The work great and my kids even use the to make some ornaments.
Check their website for craft tips or call a store to see if they have classes.
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