how to use a magnifying glass as a pretend camera lens

i've been mucking around with our camera lately, mainly because i am kind of jealous of all the big lenses i've been seeing around lately.  i used bea's plastic kiddie magnifying glass to macgyver some fun effects instead of doing them 'artificially' in photoshop.

the images on the left were taken with the canon G11 only, and on the right with added magnifying glass held over the lens. bottom right, looks like i used a macro lens kinda, middle right, like a fish eye kinda and top right like a loma kinda something

maybe i'll find myself a nice glass magnifying glass and play around some more.