A set of vibrations and waves:
rubber yarn 1 pc.
steel plate 1 pc.
holder for writing instrument 1 pc.
threaded rod with wing nut 1 pc.
wooden ball 2 pcs.
plastic ball 1 pc.
motor with relay 1 pc.
Kit Storage:
storage box with lid
Rubber thread length 3 m
Diameter of the wooden ball 60 mm
Diameter of the plastic ball 60 mm