How do I make my sisters's 10th birthday memorable?
just get her something nice that she really wants and do something really nice for her birthday and take lots of pics on the day x
invite her friends and do all the things she likes or take her somewhere she always wanted to go like disney world or something
do something she dreamed of for all her life... do something that she really loves and enjoys doing... make the party her way
give her a really good party and money for a preasent