Unwrap your Rice Krispie Squares and chop 1/4 of the length off. Discard [eat]
Place the freshly cut treats onto the rolled icing.
Cut around the treats into the icing.
Flip the treats over carefully.
Take the ruler and using a cake pen, draw lines horizontally across the icing, in the style of a piece of A4 paper. Be careful not to drag the ruler down the icing as the line will smudge.
Make the margin vertically in a different colour
Press sprinkles into the paper where you'd like the "stickers" to be.
If serving as lollipops, pierce the bottom of the treats with a stick or straw and tie with a ribbon.