Here is some websites that might help; seniorcruiseholiday.com, cruisecheap.com or senioratsea.com. All of them offers senior cruises to different places with discount as well.
You should be able to find many cruises that cater to senior citizens. Because most seniors are already retired they are the ones who have time for cruises.
Many cruise lines cater to senior citizens. HAL, Costa and Celebrity are a few. You can find all the information you need here: http://seniors-site.com/travel/cruises.html
You can find out about travel tours for senior citizens. You can go to the Senior Citizen Journal at www.seniorcitizenjournal.com to learn about tours. You can find information at www.goodseniorliving.com/travels/senior-citizens-travel-tours.php.
There are hundreds of magnificent senior cruises around the world. You should consider checking out this website for all you need to know about great cruises for senior citizens. cruises.about.com/od/seniorcruises/Cruises_for_Senior_Citizens.htm
Senior citizens get discounts on many cruiselines. Travel agencies also have specific discounts for senior citizens looking to cruise.
Try carnival cruise lines. It's a big cruise ship that has about twenty floors and elevators! If you feel like spending money than try Disney cruise lines.
You can get travel deals for senior citizens by finding out what companies have discounts for seniors. You can find senior citizen travel deals at www.smartertravel.com
Disney and Carnival both cater to the young and old alike. You should have them speak with a travel agent about a cruise on either of these two boats.
There are many good cell phones for senior citizens. One would be able to find goods phones for senior citizens on websites such as "Consumer Cellular".
Carnival Cruise lines does offer a Senior discount. www.cruisesandseniors.com has a list of the most senior friendly cruises and it also helps you to find the best prices on senior cruises. Cruisesandseniors.com also offers information to help senior travelers find the best cruise for their needs.
You can find great senior discount cruises on the following website: http://www.vacationstogo.com/senior_discounts.cfm. They have useful info.
A hat does not need to be made specifically for senior citizens. Roadrunnersports.com has great visors and caps for anyone.