If they are a lover of sports, you can get him something related to the sports. It can be a ticket to his favorite match or get him accessories related to the sport. For instance, if he is crazy about golf, you can get him golf balls, golf tees etc. You can also get him posters of his favorite players, autographed by him. Another of a good 60th birthday gift ideas is to buy him genuine quality business card. Well chosen accessories, too make a perfect gift. But you need to have the inspiration and motivation behind buying a good gift.
One of the other 25th Birthday Gift would be to throw a small party for him with only his close friends. He is going to love you for it. Just watch him relax and bouts of laughter with the party on full blast. Nothing could be better than getting his old friend to join him in the celebrations. But you need to keep in mind if he likes a large gathering or a small one. You need to keep all these factors in mind when ever planning the party for him. Perhaps he would just like to have an intimate dinner with your mom on his 60th birthday.
If he is the outdoor type, nothing could be better than gift him tickets for a short trip to an exotic place. What ever you pick from among the different 25th Birthday Gifts Ideas, just make sure you are doing the right thing for him and he will truly appreciate.