Building tube wall

Notes:

Plastic types for toys:  http://www.pvcinformation.org/assets/pdf/PlasticSubstitutesPVCtoys_Tickner.pdf

Best to worst:

5. Bio-based (cellulose, etc)

4. Polyethylene and Polypropylene

3. PET

2. Polycarbonate, ABS, Polystyrene, Polyurethane

1.  PVC (worst)

Magnetic tubes Wall

Plastic magnet cover

Magnet styles from McMaster Carr:

Magnets

(try building a pipe-wall magnetic block out of wood and connect to the pipe using a hole saw the size of the pipe we’re using.  3″ pipe?  = 3.5″ hole saw?  offset with a jig to make the magnet blocks.