Thyme plants. When I grew thyme, I had no idea that it would draw them...until my keys, cigarettes, and jewelry started disappearing. I'd find them in the oddest places. Be sure when attracting them, that you also give them an offering of milk and honey, or a small piece of cake or a cookie. Otherwise, you'll end up finding out the hard way why they're known to be mischievous.
When I was a child I thought I just had an over active imagination. But I would "play" faeries all the time! My mom has a book on faeries. I'd take it and read what they like and what they didn't. Obviously faeries like lots of different things based on what type of faerie it is.
I've had the fortune of marrying someone that is a magnet for them.
That being said thyme is attractor, I've also found a flower garden of
any kind is good as well. Be sure to leave them some sweets though, they can get cranky when there blood sugar drops.