Ahoy Maíra!
A cruise on the Disney Wonder is wonderful choice for your first sailing aboard the most magical cruise line on the seven seas! I'm excited for you to experience all that Disney Cruise Line has to offer and hope it will be the first of many vacations with Captain Mickey at the helm.
Since Disney Cruise Line has cruisers as young as six months onboard, they make cruising with little sailors very easy. There are a limited number of bottle warmers available at Guest Services for Guests to use while aboard. My advice is to stop by as soon as you embark and request one for your stateroom.
As for your other question, autograph requests (Mickey Mail) via Guest Services have been discontinued. The good news is that characters will still autograph at the various meet and greet experiences that will be sprinkled throughout each day. You can keep up-to-date with the
Character Appearances by checking your daily cruise newsletter, the Personal Navigator, the
Disney Cruise Line Navigator app (free for download for Apple and Android devices), the digital Character board located in the Grand Lobby Atrium or by calling 7-PALS from your stateroom phone. I think you will find "minnie" opportunities for photographs and autographs from all your favorite Disney pals!
I'm so glad you cruised over to the Disney Parks Moms Panel with your question! Please write back if you think of anything else before you set sail on the magnificent Disney Wonder!
Have a magical day!
Nancy