When I first started to learn how to ride my bike it was scary and I fell and scraped my knees a lot.
Then my dad supported me until I was able to ride on my own and that was nice to have my dads support
Then finally I am able to ride hands free, down a hill, at breakneck speed.
Hope this is what you needed. =)
I'm going to guess 'outside' because its describing the location of the action(playing) but I'm not 100%
Researching is the best answer
Try this pdf.
It's quite easy to understand and to formulate your opinion on the subject.
Hope it helps and good luck!