When the bond is at its strongest, a grandparent is really a grandchild's oldest and wisest best friend.
It's a relationship built on mutual adoration and unconditional love.
That particular bond is beautifully personified in this documentary, Grandpa and Me and a Helicopter to Heaven.
The film follows a Grandfather and his Grandchild as life, for the old man, is edging towards its end.
The Grandfather takes his Grandson to find a crop of rare and valuable Chanterell mushrooms in the nearby woods, a place only he has ever known about, then teaches him how to cook them perfectly.
Perhaps both knowing very soon they will have run out of time, the film is filled with many precious moments where the Grandfather actively pursues passing on as much knowledge as his can to his incredibly perceptive Grandchild.
"How does someone know they're in love?" Grandfather asks in one instance.
"Well, as you've described it, you're blinded and everything comes to a standstill," the young boy replies.
It's as heartbreaking as it is heartwarming.
The film was created by Asa Blanck and Johan Palmgren and you can see more from the filmmakers over here.
If you have a short film, web series, documentary or any other interesting video stories you would like featured on HuffPost Australia, email firstname.lastname@example.orgSuggest a correction