logo design  

Search for a website that makes logos. You may have to buy one but maybe you can just use them to get an idea.

Try a web site called Zedge.

Nice to know that you want to make a logo for “creative bubbles” , an ad agency. You need idea of how you would make a logo of creative bubbles. It is some thing creative work. It is like poetry. Ideas come at once. And creative people can get it without any struggle or hard work. You should do some thing in abstract art. Abstract art is very attractive. Paint your logo on paper and scan it in your computer. Make as many as you can and select a few with the help of your friends. And finally you would be able to select one for your ad creative bubble agency.