If you're looking to have some fun in the sun with your Weimshepherd, we can't think of a better activity suited for the beach than volleyball. This activity calls for Weimshepherds to make use of their brains as well as their brawn in order to play this old school game properly.
If you can get access to a track field or an area with a solid amount of space, you may want to give this activity a try. Relay races held amongst humans involve one person running and then handing a baton to the other. For the dog version, have your dog stay in one place while you run or jog to them with a baton in hand. Once you reach your pet, hand them the baton and then prompt them to run away from you before calling them back after they reach a certain distance.