• You can spend a lot or a little on a gift for your sister.blonde with gifts image by jeecis from Fotolia.com
  
  Buying gifts can be a difficult task, but buying them for a sibling is often harder. Depending on the time and money that you can invest, a number of gift options are available. For a 20-year-old woman, there are an array of possibilities. Find out her likes and dislikes to come up with an idea.,
  
  

Expensive Gifts

• Though these can be pricey, MP3 music players are worthy of consideration. Ranging from $49 up to $500, as of September 2010, these MP3 players can be found online or within the electronic section of most discount department stores. Used MP3 players command lower prices.
  
  A laptop is a helpful gift if your 20-year-old sister is attending college. Laptop computers can cost from $299 to $1,499, as of September 2010. Mini laptops, often called netbooks, range from $299 to $350. Again, cheaper laptops can be found online or within the electronics sections of stores.
  
  

Moderately Priced Gifts

• Gift cards tend to be good presents if you're unsure of your 20-year-old sister's specific interests. Find out her favorite restaurant, music store or clothing brands and buy a gift card. This allows your sister find an item she wants in a place she frequents.
  
  If your sister is college-bound, any dorm room accessory would be helpful. Find out if she needs anything for her desk. Perhaps she needs a coffee maker, a laundry basket or an extra set of sheets. Look for something small, but useful.
  
  

Low-cost or Free Gifts

• Though homemade gifts may seem corny, making a scrapbook or photo album is a good way to share happy moments. Turn photos into a hardbound book, using online photography sites or your corner drug store's photo department. A compact disc of pictures, meaningful songs or videos are also meaningfu.
  
  If your 20-year-old sister likes the outdoors, find a place to hike or ride a bike. Depending on the weather, take a day trip to the beach or a nearby lake. Invite some of her friends for a relaxing, fun get together. Make it a potluck dinner for more of a party feel.