i have seen some crazy stuff and ive only had the game for two weeks
1) this is one thing ive seen: once you have got the prep club house and a scooter drive the scooter off the warf or plank of wood into the beach and wait a while you should see that the scooter sinks and then floats after a while its really funny and cool
2)another thing is you can actually get your scooter or bike and drive it in the carnaval: heres how get on your scooter or bike and go to the carnival and buy a ticket get back on your scooter/bike and wait for some one to open the gate and go through quickly while on the bike/scooter go through the gate before closes congratulations you can now drive in the carnival.
3) after the mission "carnival date" where you have to buy the bear for pinky go to your dor room and you will see the bear sitting on your bookcase with all the other halloween items.