For my best friends 18th I made her like a memory book, But then I bought a swively photo frame, and photos from babies till now just as an extra. You could make her a box with her favourite things in, like sweets, smellies, chocolates, alcohol, crisps, erm jewellery, vouchers for a shop, soft toy, make a cd with her fav music on, fav magazine, I dunno random things she likes?. Think of things she enjoys? You dont have to spend loads of money!