What I have done in the past:
- Send postcards from every new city I visit (lost it's appeal to the kids)
- Bring home trinkets, hats, t-shirts (gets expensive)
- skype and more skype (internationally works great)
- The piece de la resistance...I had a great client fly my family out to Australia for 4 weeks last summer instead of me doing 2 additional roundtrips (now my kids think you fly business class everywhere)
I was hoping to hear from you dads out there for new ways to keep the peace at home, still be a dad and keep everyone happy...