I purchase a 500' foot roll of the poly tubing. 

Cut 3 pieces the same length and either cut or drilled holes about a 1/2" from each end. about $45

 Serveral rolls of green/blue painters 1" tape that wrapped around in a swirls leaving some black showing or took colored duct tape cut strips and taped it on like stripes.  about $10-15

 Purchase 100 balls from wall mart.  Sliced a cross thru one circle and cut out the other circle. about $10

Once taped slide on one ball per piece thru the cross side     first.

 I took about 10" of wire thread thru one hoop then 2nd, 3rd.  I bent wire then twisted together and formed a loop for hanging. about $5

 I then arranged hoops to look like an atom and made sure the ball looked OK then tie wrapped the bottom into place. about $1