Things that are right in front of them in plain view after they've been told where it is?
Example, DP asked for a T shirt to wear in bed as he was cold. I told him there was one in his drawer. He turned it upside down but could not find a single t shirt. i got out of bed picked up one of a pile of 6 T shirts and handed it to him.
DD asked for her ballet bag this morning. I said its hanging on hook on door in spare room DD goes in says its not there spends 15 minutes hunting the house and finally I walk into the spare room and pick ballet bag off the hook on back of spare room door (the ONLY thing on any hook)
The list could go on for ever - shoes,coats, clothes, toys, laptops, remote controls. They ask where it is, I tell them, they can't find it despite moving to exact location, I walk over and pick it up for them.