Consider gifting your dad an experience, like tickets to a sporting event or a concert, a weekend getaway, or even a fun activity he's always wanted to try. This way, you can create lasting memories without adding clutter to his space. Another idea is to make something special just for him, like a personalized photo album or a handmade coupon book filled with promises to help with tasks or run errands for him.
You could also look into donating in his name to a charity that supports a cause he cares about. This way, you can honor his values and contribute to something meaningful without giving him a physical gift. Alternatively, you could plan a special outing or celebration with just the two of you, focusing on quality time rather than material gifts.
Ultimately, it's the thought that counts, not the price tag. Showing your dad that you care and are thinking of him is what truly matters.