After clicking all over the links, it appears that the robots are rare, expensive, complex, and only made with funding for a few from huge corporations. OK. You can make a cheap robot at home with old junk, using an old 286 ( no sound,
no harddrive, no CD, no color, no mouse, etc. )
using cardboard and a few chips…
See tiny free website, with free info, on how
to use free old computers… kidbots.com
robin