Well, most men like gadgets... maybe you can buy him a tablet or a new phone. Maybe an android phone or an phone. It's really hard to suggest because we don't know your dad, but you do, so try to think and find something he doesn't have already. Try to write a list of those items and just try to take the info out of him to find out if he wants something from that list. Like for example, if you see said item on an ad on the TV, you can ay something like: ''hey, aren't those ------- so nice? Who wouldn't want to have one?''. Try it.