September
Dean noticed after a time that Castiel lacked hobbies other than staring at him all day, which was flattering and all, but it's something Cas has been doing for over a year, and he can't be too terribly interesting. So, Dean took it upon himself to find something Castiel was good at besides being a statue. Castiel tried telling Dean that he was content as is. He read books often enough, and movies were always a great time.
Dean just shook his head, "You need something physical. Entertain more than your mind."
They drove past a group of school children riding bikes when Dean had a slight "Eureka!" moment, and abruptly U-turned and took them to the nearest Wal-Mart.
Fifteen minutes later, Castiel was helping Dean manuever a new bike into the backseat of the Impala and sighing about how this wasn't necessary.
But Dean insisted.
Once they got back home, Dean looked happier than a small child on Christmas morning.
"Okay, Cas. I'm going to teach you how to ride a bike."
They fished it out of the back seat, and Dean led Castiel a little way down their driveway. HE hopped on the bike to demonstrate. "Here, Cas, this is how its done."
Apparently, if you didn't ever really learn how to ride a bike, its really hard to show someone else how. Dean got the bike to balance for all of 10 seconds, and when he went to move the pedals, the bike promptly fell over on top of him.
Castiel tried not to laugh. "Dean... You... you really don't have to do this."
Dean sighed, "Can you just try it? I mean, we already bought the bike." He accepted Castiel's hand to help him up. "And we can't take it back because I kinda just scratched it up."
Castiel chuckled lightly, "Of course, Dean. I'll try it."
Dean held the bike while the ex-angel mounted it. "Okay, I'm going to push you and run along side you. I won't let go until you tell me to."
Cas nodded, and off they went. He felt in control and said, "Let go." to Dean.
Before the bike took control, the sensation was almost like flying.
Castiel was immediately addicted, and ordered Dean to let him have another go.
After the fifth attempt, Dean noticed Castiel was less adamant about getting the bike to go much further than down the hill of their driveway, and it was doing damage to Cas. There were several scrapes and bruises forming on his arms.
"Cas." Dean said, grabbing the handlebars, stopping him from another crash. "You do know you're not supposed to be crashing. When you feel the bike taking control, you have to pedal and you'll go faster."
Castiel's eyes lit up. Faster. He had Dean help him with another go, and this time, instead of crashing, he pedalled. The wind in his hair was even better than before, and it felt magical. He rode out to the road and down aways, trying to keep within Dean's sight, and turned around.
He decided he liked nike riding. Dean was right for once, and he told him that as Dean led him inside to clean up his scrapes. Dean could be quite fussy when Castiel was hurt.