The house of Santa Claus
Everyone knows the little childrens game house of Santa Claus. You draw a line vertically, then to the upper left corner of a square, to the right vertically again, down to the low left corner, up to the left corner again and to the top of the house diagonally right, then diagonally down to the right corner again, and down to the low right corner. The figure equals a square with a cross in the middle and a little roof:
Compare this to an open envelope. It is the same figure! Now, take the envelope and redraw the edges and lines on a piece of paper, like in the drawing above. Write into the corners: 4) This is, 5) the, 3) house, 1-2) of Santa Claus. To beautify this sketch you can glue it to a nice coloured carton and hide bills behind the house.