Sure Lotus, let's see.......
Arnis, or Kali/Escrima/stick fighting is the other term used, is a Phillipino art that uses two sticks to defend and attack with. The more advanced practice uses two short swords, of course in the beginning sticks are the safer option. Without sticks, your hands become your weapons, and are used in a very similar fashion.
I was lucky enough to train with an 8th dan in Sikaran Arnis (ex. world champion full contact), it is a very tough art indeed, but awesome to experience. Do a google search and you'll get some great info.
Kendo, means the Way Of The Sword. It has developed much over the years and has a long and rich history. Again, a goggle search will give you some great info. Here is a link for more info.
http://www.kendo.or.jp/english-page/english-top-page.htm
You or anyone may find it hard to distinguish between different arts on appearance, but if you get involved in Martial Arts, I'm sure you'll get a better understanding of the similarities and differences.
And as for my avatar, nothing else would fit in the little square, so Sumo-san will have to do for now anyway! Glad you like him!
kokoro