TUNNEL 3D

This technique was inspired by the little piece of Kaiser paper at the bottom.  I began with a white card with a circle cut-out then mounted a piece of red lightweight card with an extra-large star cut out with a hole punch behind it, using double-sided foam tape to add dimension.  a yellow layer with a circular cut out was added in the same way.  This was repeated using smaller punches, and finally the scrapbook paper with the yellow star on the red circle was mounted under a final red star cut out.
To make this fairly thick 3d fit into a regular aperture card, second fold lines need to be scored a few mm away from the existing ones to make a thin "box" enclosure.
This will work with any shapes as long as you have punches or dies in several sizes.