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