I really like some of the fonts on this website and am trying to insatll them on to open office but i dont know how ? Could anyone help me, i am only 11 years old and am stuck

You don't install a font on Open Office or any other application Jack. You install a font on Windows itself. Click the Help link above to read how to.

How to install in Windows : http://www.dafont.com/fr/faq.php#win

If you can't, perhaps can you ask your father or your mother to show that for the first time. It's quick and easy.