3d printed gyroscope can be printed out of any solid matirails bearings used are 608 standart bearings-6 units assembling: m2 nuts heat inserted to every parts with hexagonal holes and then screw in the other side of the part with m2 bolts insert bearings in the required places and screw the stands to a piece of wood you can fill the flywheel(the center of the gyro) with a dense matirial in my case I filles the middle with play-doh and the outer holes with oval magnets use: stick the holder on one of the side of the guro and wind a string on the flywheel pull the string to spin the gyro and take off the holder move the system and wacth the gyro do his thing Enjoy!!!