3d pen for kids.

3D pens are a hit of recent years. It is a more compact, simpler and less precise version of 3D... read more

How to make a smog sensor - DIY

The Nova SDS011 sensor seems to be the cheapest and the best choice - on the basis of this sensor... read more

Master spool from Hobby-Store.pl

MASTERSPOOL is a simple exchangeable reel for use with REFILL which produces several companies in... read more
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