Disclaimer: I do not own Hetalia. Nora is basically an OC that represents the city Tromsø up in North-Norway, as such, Norway is basically her dad.
It took a long time for Nora to learn to ride a bike - it wasn't because she didn't want to, she definitely did, that was easy to see. But she hadn't seen anyone else on a bike yet, so she said it was boring and she didn't want to. The reality was that she didn't want to do it alone.
It took the older Norwegian a month, just into the beginning of July, to realize that she actually did want to and it was only because he saw her look at a family pass them after a trip to the store, all four of the humans on bikes, children included.
So getting the hint, though she'd probably not meant it as so, he got himself a bicycle as well and told her that if she learned to ride hers before the month was over, they'd take a trip to the beach on them.
She learned it in record time.