For in-laws, I would recommend getting something thoughtful and personal. It could be a gift that shows how well you know them and their interests. For example, if they're into gardening, you could get them a nice set of gardening tools or a book on their favorite plants. Alternatively, if they're foodies, you could get them a gift certificate to a nice restaurant or a cookbook they've been wanting to try. Ultimately, the key is to put some thought into your gift so they know you really care.