Hand carved stamps!?

In one of my play groups book study we were to make a hand carved or other hand made stamp.  I like this idea... it kinda seems more your art if the stamps you use are your creations, right?  Here is two that I have made.  The swallow one is the second swallow stamp I have made.  The first swallow I made from some kind of tape that I "borrowed" from HRH's (his royal highness) stuff in his garage that he used to cushion I think a truck bed cover.  It was easy to cut, to put lines in, to stick to a piece of card board, but I used it too much and it is starting to crumble.  So, this one I made from some 3/8 inch craft foam which I bought at the yard sale mall a summer or two ago.  It too was easy to cut and line, and so far, I like how it stamps.  I don't know how long it will last, but I am sure it is going to hold up better than the foam rubber tape.  The face stamp I carved from some found pieces of rubbery stuff I have had around the garage studio for just that purpose.  I just needed a nudge to get on with it.  The rubbery stuff is again a bit soft for a stamp and it was hard to cut.  I have actually attempted to toss the darn thing away but changed my "stash" orientated mind at the last minute.  I decided to play with it just to see what could be done with it.  It is really a primative stamp, but I think the little smile page is okay!  I have a few more hand made stamps too of like background types that I made by gluing craft foam pieces onto a base.