When you meet your son's girlfriend for the first time, you can send some commemorative gifts to make your son's girlfriend feel welcome from his parents. The specific gifts that can be given are as follows: 1. Jewelry or accessories: If your son's girlfriend likes to wear jewelry or accessories, you can send a beautiful jewelry or accessories to show your love and concern for her.

2. Daily necessities: You can choose some practical daily necessities as gifts, such as a beautiful water cup, a fashionable wallet, a pair of simple and elegant shoes, a soft and comfortable four-piece suit and so on. These gifts can remind your son's girlfriend of you in her daily life and bring her convenience and comfort.

3, a bunch of flowers: flowers are a romantic and enthusiastic expression, you can send a bunch of flowers to your son's girlfriend, so that your son's girlfriend feels welcome and likes him.

4. Dessert: Dessert can make people feel sweet and warm. You can send some chocolates or exquisite desserts to your son's girlfriend to show your concern and love for your son's girlfriend.

5. Handicrafts: You can give your son's girlfriend a handicraft made by yourself to show your appreciation and respect for her.