At the same time, the child is not frustrated or confused by interacting with {HEAD ~ a toolbar} featuring {TAIL ~ a number} of disabled controls 
featuring
At the same time , the child is not frustrated or confused by interacting with { HEAD ~ a toolbar } featuring { TAIL ~ a number } of disabled controls
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