Because of the simpleness, Eric's model can not demonstrate the difference between G-C and A-T pairs. This is a major complain that my wife had who is also a biologist. That triggered me to build a more complicated DNA model. While preserve the beauty of Eric's model, I wanted more information to be added. After tried and errors to about 2:00am. I thought one solution. Here it is. The middle one is what I built. The right one is Eric's model. My one is bigger. It has more room between double helix. So I can put three or two hydrogen bonds in.
My mother also got involve. I found one site talk about knitting. She followed the instruction and knitted one.
Some models created by Affymetrix Chips
Some pictures of a model made by Illumina Genechips and Lego
