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Engineers Introduce Berkeley Humanoid Lite, Open-Source, Customizable, 3D-Printed Robot for Tech Newbies.
(engineering.berkeley.edu)
This is a most excellent place for technology news and articles.
Part cost is estimated to be under $5000 and take a week for a novice roboticist to build. Very cool, but me and my kids will probably skip this one.
They have a tiny version that is listed as 1000 on their website, plus the simulation is FOSS