Photos, family, and a plethora of biscuits.

This is how John Key marked his last day in Parliament, according to a video by his son Max.

Max, a 21-year-old aspiring musician, recorded a video blog that takes us behind the scenes of his dad's final session in the House.

INSTAGRAM/MAX KEY Despite his dad being prime minister for eight years, Max Key still hasn't figured out Parliament's layout.

The clip is Max's third vlog - a video blog - and follows him on his trip to Wellington last Wednesday to watch his father give his valedictory speech to Parliament.

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It offers rare insight into the Key family's dynamic, with Max pestering John Key for comment - "I'm busy" is all he gets - and bantering with sister Stephie.

​Max appears affected by his dad's speech, saying it nearly brought him to tears. ​"I was trying not to tear up," he said.

The video also affords the Key children some time to reflect on their legacy as "political children".

"I think me and Stephie, we really nailed it. We did some crack-up s***, to be honest," Max says.

Max takes the viewer into his father's "new office" - a big step down from his suite at the top of the Beehive, where Key's memorabilia from his eight years as Prime Minister is still packed in boxes.

He also makes the most of the biscuit platter, and tries to corral various family members and associates into appearing in the vlog - with limited success.

And despite eight years as New Zealand's "First Son", Max reveals he still gets lost in Parliament House.

The vlog also provides the politician's son with a platform to use some decidedly un-PC language.

He dips his toe into hot water when he uses the word "gay" to mean "bad" near the start of the clip.

Max Key was at the centre of some controversy last year when he filmed himself yelling, "real men ride women" at a cyclist as he drove past.