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.
An engraved ring could be a great gift for making your hubby feel special. You should be very careful while selecting the words that you wanna engrave on the ring; something that would make your husband feel proud. You may also go for engraved cuff links or a leather wallet.