According to an article that I was just reading here on MSN.. these are the WORST things you could possibly do for your dad for Father's Day:

3.  Socks and underwear.

2.  A tie.

1.  FORGETTING.. or not giving him anything at all.

So what gifts WOULD be good?  Here are a few things they suggest:

1) Photos of the kids,

2) Handmade gifts and cards,

3) Just spending time with the family.

Now I'm not a father.. but I have to tell you that while photos and handmade gifts and cards would be great.. don't be shy to go into an electronics store and grab be some sort of gadget.  Honestly.. dads are just big kids.. we still like toys.. it's just that the type of toy is different.