The elderly prefer gadgets, my grandfather is one of them. How about giving him a real-life pottery doll? As long as you provide a photo, you can make a real-life pottery doll similar to the photo. Grandpa must be very happy to see this cute pottery doll. You can also give him a customized anti-fatigue bracelet. The elderly must be very tired when they are old. Send him a magnetic anti-fatigue titanium germanium bracelet to reduce his fatigue and let him live a long life. In the era when my grandfather lived, there were wars everywhere. If my grandfather was also a soldier, you can give him a customized military license plate, which is free to engrave. You can engrave the year when my grandfather joined the army, or other commemorative time.
The elderly are getting old, and the younger generation should take good care of them, come back often to chat with them, and accompany them to relieve their boredom. If the elderly like pets, you can give them a cute pet dog, accompany them to go shopping and walk every day, which will not only make grandpa happy, but also good for the body to exercise their muscles and bones frequently. You can also give some gifts such as air purifiers and bamboo charcoal family packs to purify the air at home, so that the air at home is fresh and good for the body. The elderly are old and lazy, so you can let them dry their quilts more often. These are all within your ability.
You can also customize a birthday cake to announce the good news. The most important thing is to let grandpa understand your intentions and know that you are a filial granddaughter-in-law.