First of all, congratulations, I wish you a long life together and a son. Generally speaking, wedding thank-you banquets are nothing more than giving friends and relatives some candy, good cigarettes, good wine and the like. If you want to be creative and different, I think you can do this: you can print a photo of you and the bride on the candy box, so that even after eating the candy, your friends will not want to throw it away and can keep it as a souvenir.
You can also design some small pendants, such as key chains with your photos, mobile phone chains, etc., and you can write your own words of thanks to your relatives and friends on the pendants to express your gratitude to them. They will definitely be very happy to receive such gifts.
It is also best to consider giving relatives and friends red wine. Giving red wine at a wedding symbolizes joy and good luck, and it fits the festive atmosphere of marriage. I hope my suggestions can help you.