A decade into the marriage and still going strong? Nice. The official theme for the tenth anniversary is tin or aluminum. Gift ideas for this year that revolve around tin and aluminum? You can make it a funny one, by stacking up the fridge with cans of his or her favorite drink. On a more serious note, tin or aluminum photo frames, or a door sign that has your names carved on it or maybe even wind chimes.
A letter telling your parents of all the things you are grateful for. Make breakfast for them, or in the evening, cook a nice meal and set up a table outside with candles. Get them two movie tickets or tickets to a concert or play that they would like to watch.