Michael and Frances Higgins
These are a couple of really cool fused-glass mobiles made by Michael and Frances Higgins, owners of Higgins Glass Studio in Riverside, Illinois since 1948.
The top one is from the 90's and the bottom one is from the 70's.
Though the mobiles are my favorite, they also make things like sconces, platters, bowls, etc. My mom bought me a bowl that looks like their work, but it's not marked, so I am not sure.