added more resources

slides/3dprinting.html

@@ -1064,6 +1064,30 @@ Save to SVG
 - Include images
 ]
 
+--- 
+---
+# If you want more
+
+.left-column50[
+
+[3D printing for health](http://make4all.org/portfolio/3d-printing-for-health/)
+
+[More materials](http://make4all.org/portfolio/3d-printing-in-a-range-of-materials/)
+
+[Metamaterials](http://make4all.org/portfolio/metamaterials/)
+
+[3D printing for education](http://make4all.org/portfolio/3d-printing-for-education/)
+
+]
+.right-column50[
+
+[Interactive objects](http://make4all.org/portfolio/3d-printing-of-interactive-objects/)
+
+[3D printing and sustainability](http://make4all.org/portfolio/3d-printing-and-sustainability/)
+
+[Options for rapid fabrication with 3D printing](http://make4all.org/portfolio/rapid-fabrication-prototyping/)
+]
+
 ---
 # The End!