The interior of each of the toys includes a gyroscope, which when operated creates considerable rotational momentum, tending to resist {HEAD ~ the movement} of {TAIL ~ the toy} by the user 
of
The interior of each of the toys includes a gyroscope , which when operated creates considerable rotational momentum , tending to resist { HEAD ~ the movement } of { TAIL ~ the toy } by the user
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH