This tutorial uses simple found materials to create miniature diapers so you can make as many as you need for your display. I used recyled plastic grocery bags and facial tissues. You can use a bead or a section of painted dowel or square stock to make a simple tissue / wipe box or holder. Use a single ply of facial tissue to make the wipes.
I show how to make the heads for diaper pins from polymer clay in this tutorial, but you can also make more traditional safety pins substituting heavy foil for the polymer clay. I used 24 gauge wire to make the pins, you can make finer pins with finer wire.