Making mosaic stepping stones for the garden with kids

My grand plan is to make an entire pathway on the side of our house to meander through a yet to be created flower garden on the side of our house.  I will post before and progress pictures soon.
I love this Flip flop shaped stepping stone kit.  I just ordered one of these for my 6 year old, T.J. and myself to use as soon as we have created our square ones (previous post).  We opened out first kit tonight to get ready for casting tomorrow. You will need a small bucket or large plastic bowl from the dollar store to mix the cement in.
While you are at the dollar store, pick up some extra glass gems for making more stones with the re-usable mold in the kit.  When you have used the cement that comes in the kit, you can purchase a bag of regular old cement (not concrete) to use the mold again and again.
When I taught fourth grade, I made stepping stones with my entire class using donated un-used pizza boxes lined with clear Contact paper.
We used it sticky side up, placing our decorations on the Contact paper and then pouring the cement it over the glass gems.  The kit has you decorate the top of the stepping stone.  I think this will work better than pouring the cement over the top; the cement ended up oozing around the gems and covering them up a little.
Check back tomorrow for pictures of our stepping stone project.