I already said this for their Complexient screensaver, but let me say it again for this one:

I visited the Family Friendly Software site, and what struck me as a little odd, is that while they offer a trial version of their $20 Racing Math program, all three of their screensavers, (none of which appeal to me due to their gaudy colors), only have an option to buy at $5.00 each.

Undoubtedly, a certain amount of time and energy went into creating their screensavers; however, given the wide range of free, high-quality, openGL and quartz based screensavers which are currently available for OSX, I think this developer is going to have a difficult time convincing folks to buy their screensavers, even if they are only $5 each.

I think a little business sense is in order here.