Five Star Gift Ideas

That sounds like a great interest to incorporate into a Father's Day gift for your grandpa. Here are a few ideas:

1. Calisthenics book: You could consider getting him a book on calisthenics to help him learn new exercises or techniques. Some popular titles in this category include Starting Strength by Mark Rippetoe or Convict Conditioning by Paul Wade.

2. Resistance bands: Resistance bands are a portable training tool that can be used for a wide range of exercises. You could get him a set of these bands, so he can add some resistance to his calisthenics movements.

3. Workout gear: You could consider getting him some workout gear that's specifically designed for calisthenics, such as a set of workout gloves or a calisthenics t-shirt.

4. Home gym equipment: Depending on your budget, you could consider getting him some home gym equipment that will allow him to do a variety of calisthenics exercises. Some ideas might include a pull-up bar or a set of parallettes.

5. Online classes or training programs: If your grandpa is interested in taking his calisthenics to the next level, you could consider buying him access to an online training program or workout class. This could be a great way for him to learn new techniques and get some guidance from a professional trainer.

Or you can get him a star map with an important date you share.