NWR: Father's Day HELP!!

I wasn't going to get any father's day gifts for anyone, but have finally realized that I need to. My fiance has a four year old so I need to get him something, as well as my FFIL and dad. Anyone have any ideas that won't cost a fortune and that I can send in the mail?
I also have to go to a wedding in NH in about a month for one of my BMs so money is pretty tight right now.
TIA!