Cycle? But How?

Ever wondered how you managed to learn how to cycle when you were still a little child? I do think about that once in a while. It's probably because i forgot how did i managed to do it. Such skill, though important, does not leave a memory on 'how did i do it' but rather 'am i doing it' in a sense that it just comes to me when i need to ride a bike.

So i need some help here. My little sister doesn't know how to cycle. She's at the age of 7 now. Though she tried a few times, after falling for a couple of times, she gave up. i need your opinion on how to train a child to learn to ride a bicycle.

Maybe she's just scared of pain. Maybe we learned how to cycle because we WANTED to cycle, i'm not so sure but i think she dosen't really think cycling is fun or important. Imagine yourself being the laughing stock of your friends when they find out that you don't know how to cycle.

So, please help with your honest suggestions. Thank You.