Heidi, who has daughters Leni, seven, and Lou, 20-months, and sons Henry, five, and Johan, four, with husband Seal, 48, wants to go on an adventure on the seas.
The 38-year-old told WWD.com: 'What's next? To go on a great holiday with my family. We are going on a boat to Italy. I just love when the kids can go and eat sea urchin and the sea urchin is literally going like this [waves hands].
'You cut the bottom off and then you eat it.'
She added: 'That's what they do when you go to [restaurant] Nobu or whatever, it's the same sea urchin, so you might as well eat it when it first comes out of the sea.'