Replying to Paypal transfers

So I'm wondering what my bank statement will say if I transfer 250 to my paypal account... Basically I don't want my parents to see me spending 250 dollars... it will just say it was a transfer and not the item that I bought right? Also, if I sell something on the b/s/t forum will the funds stay on paypal and not deposit into my bank? Just so I can possibly buy more stuff later...

Sorry about the dumb questions, I just wanna know.