Actually, the round discs I buy for Sadie are not, strictly speaking, frisbees. I can't throw a frisbee properly. I bought my first Aerobie Superdisc at the state fair from some people who had a trained dog act; back at home, I found out I could make it sail away with the greatest of ease. Another advantage of the Superdisc is the soft edge, so when Sadie jumps up and catches it, her mouth doesn't get hurt.
So far I haven't found any local stores that sell Aerobie products, so I order them from Amazon.com.
Yesterday the mailman brought Sadie's new toy; on the way back to the house I ripped the package open, pulled out the frisbee, and gave it a toss. Sadie was after it immediately, but she didn't return with it like she usually does. She went far over by the garden in the shade and lay down, placing her frisbee beside her. She probably spent twenty minutes over there, I guess just getting acquainted with her new toy. I later called her to me and she came, but it was as though she was daring me to touch that frisbee.
Later on, I looked out the front door and saw Sadie sitting there holding her frisbee on edge, and she remained like that for at least five minutes. Maybe these things are worth the ridiculous price I pay for them. At least Sadie seems to think so.