Some good ideas you could use are gift-cards as they are like giving him money, but more professionally. If you know what your dad likes, like gaming for instance, then giving him a game card would be brilliant, if however you don't know, you can just give him an amazon or eBay gift card so he can decide what he wants.
www.find-me-a-gift.co.uk/18th-birthday-gifts/18th-birthday-ideas.asp has lots of great ideas for birthday gifts for 18 year olds. Good luck and have fun.
This website, http://www.squidoo.com/70th-birthday-gift-ideas-for-men-and-women, has many great ideas for someone turning 70. A personalized gift is always a good gift, so browse around on this website to get inspiration.
some good websites include : ehow.com where lots of people can write articles about what they did to celebrate a person's 70th birthday. Next would be the site: http://www.gift-ideas-muse.com/70th-birthday-gift-ideas.html where the administrators list gift ideas that are creative.
Cards and flowers are always good as gifts, no matter the age. Get them a gift card for a place they go to regularly or for a relaxing massage. A gift they can use.
Good gift ideas for a baby's first birthday can be found in books or magazines. One can also ask others who have experience. One can also look in forums online for ideas.
A good birthday gift for a man would be sport tickets. Maybe he is into baseball or basketball. Tickets are the best gift because they can enjoy the sport with a friend or spouse.
You could utilize a talent of yours and make something that your husband would like for his birthday. There are many gifts that you could hand make if you are creative.
Some ideas for birthday gifts can be gift certificates for a movie. Try to think of his hobbies or interests to help you think of a good present for his birthday.
A personal birthday gift would be a good gift for anyone. It demonstrates that you put time and thought into their gift, and that is something that anyone could appreciate. Thingsremembered.com and personalizationmall.com are both good resourced for personalized gifts.
something that is in and 'cool' like an ipod or iphone. technology is always a good option.
Whilst flowers can be great 21st birthday gift ideas it is always nice to give something which will last and bring back happy memories each time they look at it. A birthday gem is a nice gift idea for a 21st birthday.
a cheap 10 dollar heart charm necklace from wallmert, box of chocolates, A picture of the 2 of you together, and flowers. That's what me bf gave me and I loved it