I think it will work in sand just fine. The part that literally screws into the ground is 18" long so it goes in pretty deep and is very sturdy. I'm also old, and this has been a lifesaver lol.
Also, mine loses her mind over this, and it's low impact on us old folks:
https://www.amazon.com/DIBBATU-Interactive-Outdoor-Exercise-Training/dp/B08PNTDJ7B/ref=sr\_1\_7?crid=1NIFGKUQOB25K&keywords=flirt+wand&qid=1675122948&sprefix=flirt+wand%2Caps%2C139&sr=8-7
I'm gonna pick up a Chuckit, thanks for the link!
We got this one: DIBBATU Flirt Pole for Dogs Interactive Dog Toys for Large Medium Small Dogs Chase and Tug of War, Dog Teaser Wand with Lure Chewing Toy for Outdoor Exercise & Training. https://www.amazon.com/dp/B08PNTDJ7B?ref_=cm_sw_r_apin_dp_B5GWSBPVN78D6TQXRCF5