¿Puedo montar mi bicicleta?

Or more familarly: ¿puedo montar en mi bici?
Hope it helps. :-)

Hi Courtney :)

Without more context it's a bit difficult.. here is what I would say to a child... it's not formal and nice :)

Hope it helps :) Flavio

Remember that possesives are more frequent in English than in Spanish. For instance, in English you say "I raise MY hand", but "Levanto LA mano" in Spanish. In Spanish, the fact that it is my hand that I am raising is implicit.
If you said "levanto MI mano" it sounds unnatural (who else's hand would you normally raise??)
It's the same with the bike in this case. The kid is asking permission to go outside and ride a bike. Whose bike it is is not important.
At least in Spanish we don't run the risk of dialogues like "May I run my bike? No And yours?" And kids are great at doing that, believe me!! :-))

Best regards,

Patricia (been asked permission many times in the past :-) )

Here again, in different countries a different expression is used. In the case of the Caribbean and among the spanish speaking folks in New York City, where I grew up, this would be the translation. But it would be an expert whoever knew all the different countrie's translation