After doing the 'I want to play frisbee with a dog all day long' action either the 'Foam-Guard' or 'Swirl-O-Delic' frisbees become stuck in your Sim's hand.
What can be done?
Avoid using the 'Foam-Guard' or 'Swirl-O-Delic' frisbees. If one does become stuck, purchase any other frisbee (that isn't one of the previously mentioned ones) and perform any action on it. The frisbee will unstick and appear on the ground. You'll need to move and place the frisbee from the ground again in order to use it. If you've had to purchase a frisbee after it became stuck, please contact support with a screenshot of your problem.
Note: - The Sims FreePlay team has resolved this issue in the next update!