Wow, just visited a forum and found a link to these free fonts called Moms corner 4 kids. It's a great site and had those dingbats on it, which are great to watercolour in.
Hopefully this should make them work:
Close down all applications that would access the fonts.
Download or move them to c:\windows\font (this should be your default font directory)
If this is not your font directory, you can find out by doing a search on *.ttf and this will bring up where all your fonts are.
Hopefully when you next open the application that you would use them in, it should pick them up, if not then it's worth a reboot. Hope this helps!