what should i get for my sisters 10th birthday.?

her birthday is october 5th and i need to give her something. it can't be expensive because i have like no money.and she looks up to me so i want to make her birthday special.I wont be there on her birthday because i live with my mom and she lives with my dad so i wont be there until the weekend. she says that she is a tomboy but she still likes girly things too.

for example she likes video games but she likes baby dolls.

she dresses like a tomboy but doesn't like to get dirty,and likes jonas brothers and twilight.

When i am not there she spends more time with her brothers than she does her sister but when i am there she only talks to me. so if you have any ideas please help me.