Don't Ever Try to Outsmart a Four Year Old…

So my husband and I thought we were being clever when one Christmas Eve as we were putting out the presents for the girls from Santa…
We came up with this idea that if we took a piece of white chalk and drew a footprint on the fireplace hearth that we could tell the girls (mostly Heather because Katie was only 2) that it was Santa's footprint and that he left it there when he came down the chimney to leave the presents. We were excited the next morning when we thought our plan was foolproof and said to Heather, "Look Santa left a magic footprint over there by the fireplace." She went over to examine the footprint, took her finger and touched it then smelled it and said to us both very seriously, "It's chalk!" It was so hard not to laugh, but what could we do! Ho Ho Ho.