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