Ivanka Trump was soaking up the magic at Disneyland Paris … just as her father, President Donald Trump, threatened to kill off Iran’s “whole civilization.”

Ivanka was seen Tuesday with her kiddos, roaming the French amusement park … and made a stop at “Crush’s Coaster” — a spinning “Finding Nemo” themed roller coaster.

Check out the video … the group’s grinning ear-to-ear as they exit the ride — looking ready to take on the rest of the park.

An eyewitness tells us the crew had plenty of security around them … with at least one security guard posted outside the coaster, earpiece in, waiting for them to finish.

Clearly, Ivanka and co. are thrill-seekers … we’re told they also hit the “Tower of Terror” — a drop ride that plunges riders 13 stories.

Needless to say … it’s a STARK contrast from what was unfolding back home — with Donald Trump weighing the total destruction of Iran. Her hubby, Jared Kushner, has also been a key negotiator in the Iran conflict.

Full transparency … our footage of Ivanka was taken about 30 minutes after Trump fired off his atomic threat on Truth Social.