Hide and seek and seek and seek

Granny waited a long time for Baba to come back to collect her. When he eventually arrived, she asked him why. He said he'd been driven home, went straight in the house, and was planning to grab the car keys and drive straight back. Except for this problem...

Before going on holiday, Granny was worried about her new car. She thought maybe they would be burgled whilst away. She told Baba to hide every car key. He hid them really well, so well that he couldn't find them. He'd searched high and low for an hour... or so he said...