Trip to Denver, Colorado?

Travel Info
HI! Me and my mom are flying to denver colorado tomarrow to visit my older brother in college. We are spending this whole week there. My brother has classes a lot of the day, so I don't know what to do for fun. My mom and I will go see the mountains and stuff but what do I do on the plane. I have two 3 hour layovers on the way there and I don't know what to bring. I am bringing my iPod (which is fully loaded with new stuff) and my cell phone. I have a handheld electronic Sudoku thinger that I will bring and I am bringing a book. What else should I do during layovers and stuff? Can you bring snacks and water on the plane? The hotel we are staying at has a pool so I will swim but what if I get tired of this stuff? Any creative things I can bring along? (it would be nice if they are not expensive and easy to pack in a carry on.)

Thanks so much! I am SOOO EXCITED! I have been to maine, georgia, arizona, hawaii, and a lot of states but never colorado! I am SOO Happy!

Travel Tips

There will be plenty to do in Denver, The Art Museum, Denver U.S. MINT, Shop The 16th Mall. Visit Red Rocks Amphitheater. Coors Brewery, Colorado History Museum. You'll love going to the Casa Bonita restaurant in west Denver. Just a fun place You can eat in a gold mine,
Mexican village see Cliff divers

Others
You can't bring water, or any liquid for that matter, in your carryon unless it is 3.4 fl oz or less and put into a 1 qt ziploc bag. Make sure you check your airline's website for more info about this.
Check out the 16th Street Mall, and Larimer Square. Also, try and visit Red Rocks in Morrison, only about 15 minutes outside downtown Denver.
Resident of Lakewood, CO
Plan everything inside. It's winter out there. Cold and blah this time of year.