Katie Price's son Harvey has made her realise material things don't matter.

The 37-year-old star's eldest son, 13, suffers from septo-optic dysplasia and Prader-Willi syndrome and his disability has taught her how important life is over money or possessions.

She explained: ''Material things don't become important because life is life ... Harvey will have no idea what it would be like to pay bills, he lives like the king - he is the king of the house - and we wouldn't have it any other way.

''People think because I have money that I can do this or that, but you can have as much money as you want, it's not going to make anything any better for Harvey - all he wants is paper and crayons!''

But the former glamour model - who also has Junior, 10, Princess, eight, Jett, two and 14-month-old Bunny - admitted it's difficult looking after the teenager because he requires so much care and can pose a threat to her other kids if he's angry.

Speaking on ITV's 'This Morning', she said: ''They know if he's in a bad mood or not and if he's in a bad mood they know to stay away, because you just don't know what he'd be like. Sometimes he might pick Bunny up and wants to kiss her, and I go 'Ah, that's so sweet', but really I'm thinking 'Oh my God, is he going to launch her?' because you don't know what he's going to do. So you do have to watch him with everything.

''Yes, he is challenging and hard work, he wets his bed ... he doesn't know how to aim on the toilet, so we're constantly cleaning the toilet, but you know, that's part and parcel of having Harvey.

''If he doesn't have his meds, he will die. He is hard work but I wouldn't change him for anything.''