Well, in-laws can be a tricky bunch to please. They're not your own family, so you don't have the same familiarity with their interests and tastes. However, I've found that in-laws often appreciate thoughtful gestures more than expensive gifts. Try to think about what your in-laws enjoy doing in their free time, and look for a gift that reflects their interests. If your in-laws are food lovers, you could give them a gift basket of gourmet treats or a cooking class to help them expand their culinary horizons.