Heidi Klum & Seal at Disneyland -- Happiest Place on Earth for Everyone But Exes

Heidi Klum had a little bit of jungle fever Wednesday ... hitting up Disneyland's Jungle Cruise ride with her kids. Her ex-hubby Seal was there too.

The divorced couple arranged a family play day ... putting personal demons aside to hang at the Haunted Mansion and a bunch of other attractions -- although there was ZERO attraction between the exes.

Heidi and Seal maintained a respectful distance ... keeping several paces apart most of the day.

MILF-loving Mickey, on the other hand -- was all up in Heidi's biz.