First Year at Hogwarts

Your with your sister Amanda and it is your first year going to Hogwarts. "Don't worry bro. Everyone is worried on their first year." your sister exclaims.
"Thanks sis, but how do I actually do this?" you reply.

"You just run into it." and just like that your sister disappears through a wall.

"But...how did?" It takes you a few minutes to muster up the courage to go through but then you dash towards the wall. You close your eyes and brace for impact and bam! You open your eyes and see the Hogwarts Express. You need to make sure you have everything but where is your sister?