The tele-porter
You have seen these in adverts on tri-D, HD and Grey-Ray. They look small but can carry a lot. You can’t remember putting it there, and you seem to have lost the manual.
The model you are carrying looks like a human figure, dressed much like a 19th century railway porter, pulling a small trolley on wheels. He stands three inches tall on your palm, looking up at you expectantly.
You can:
tie him up with the string
put the cheese in the trolley
climb into his trolley yourself