I also found a sight word activity using gems at Mrs. Bremer's K. This is a really cute idea!!
Pre-K and K Sharing.
Our Little Monkeys.
More pages similar to that one can be found on Making Learning Fun Magnet Pages. They are designed to be used with flat, round magnets but I think that the glass gems would work well too! I found one for every letter of the alphabet and the numbers 1-10. I also found pages for Brown Bear, Brown Bear What So You See by Eric Carle. Just click on the link below the picture to go to that page. I love the website Making Learning Fun!!