Visiting someone at work...?

Hey,

I am friends with this girl (I kinda like her, alot) and I was joking about visiting her at work for 'bants'. Anyway, she said yeh sure and gave me a time that she is working. Do I go? If I do, then, what should I do? I think she finds the job boring at times so I was thinking of taking something she likes with me (may also be an excuse if the boss asks) I walk straight past a sweet shop, was thinking of getting her fav. Just for a joke, or is that childish? Both 17.

I'm really stuck on what to do because I kinda said I wasn't going to but I actually am so it'll be more of a surprise visit.

What would you do in this situation? Please help!

Thanks