I want to do something nice for my dad?

It's a long story but he left his job as a commodities trader to work for his friend who had a 20yr old business and basically offered him the potential to make a lot of money down the road. Unfortunately with the financial crisis the company wasn't able to stay afloat even though my dad's friend was making millions just a year before. So then my dad wanted to open the same type of business and run it more honestly. His friend transferred all of the materials and client lists but eventually my dad had to dissolve the business so now he's just trying to get back into what he was doing before. He has his broker's license for stocks, commodities and mortgages but in this economy those jobs aren't what they used to be. He's reasonably stressed and I just want to do something that will show him that even if he doesn't have a job he's still a great dad. I know it's hard for a lot of men when they feel like they can't provide for their families they feel like they've failed and I really think he's depressed right now. Financially our family is fine because my stepmom has a good paying job. We're not on the verge of losing our house or anything like that but now we just don't get to have to luxuries we always used to. I'm old enough where I don't care about that stuff as much and can support myself but my brothers make it hard for him, they just turned 16 and want a car and a computer and all that stuff. I know that's a lot of information for a simple question but basically just what do you guys think would be a good thing to do for him to show him how much I appreciate him without straight out telling him because I get emotionally really easy and I don't want to cry or anything ...