There are several ways to get IPA characters into your worksheets and online postings, including on this site. One that seems fairly painless, at least on a Mac, is to use the IPA palette:
Here are some examples of characters I inserted using the palette:
ø ɘ ə ɵ ʉ ɤ ɞ ɐ ɶ æ ɛ ɪ ̏ ̀ ̂ ᷅ ‖ ɱ ɖ ʐ ʂ ʃ ð ɮ ɻ ɰ ʕ ɠ ʡ ʑ
and there are lots more. They can be sized and colored, just like regular text:
ø ɘ ə ɵ ʉ ɤ ɞ ɐ ɶ æ ɛ ɪ ̏ ̀ ̂ ᷅ ‖ ɱ ɖ ʐ ʂ ʃ ð ɮ ɻ ɰ ʕ ɠ ʡ ʑ