Our GraviTrack Marble Machine Kit is our newest addition to the Marble-Drop mechanism family. Elegant, swooping hands pass marbles to each other to the top of a sweeping multi-level track, available in either solar or battery configuration! Approximately twice as wide as our spiral Solar or Battery Marble machine kits, the GraviTrack is still desk-top compact but large enough for easy mechanical assembly. Pre-order yours […]
New Construction Material!
Dave Hrynkiw
June 14, 2002
We now sell Sintra, a lightweight, easy to work with material that comes in a variety of colors including white, red, blue and yellow. Check the link at: Sintra Sales page
Sintra is easy to cut by scoring a line with a knife and then breaking it. Glue also works well bonding pieces of sintra together.
Note that we do not stock black sintra as black objects tend to absorb a lot of heat, so under 500W halogen lamps black sintra starts to become soft, this is less of a problem with brighter colors.
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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.