K.P.
I second the Omaha Steak suggestion! We've given that gift before and it's a huge hit.
iTunes gift card
For coffee drinkers... gift card to Dunkin Donuts and a nice travel mug.
If they travel a lot with their families, a nice travel toiletry kit. I gave one to my husband and brothers-in-law last year and they love them.
Think practical... men aren't into "do-dads" or "stuff", but gift cards to places they go every day- or would want to are great! Add a hand-written thank you from you and your children and you're all set.