Want to get your kids excited about alphabetizing? I know, I know...excited about alphabetizing? There's nothing exciting about it, right? WRONG!! When you're a kid, anything can be exciting (yes, even alphabetizing) if the subject matter is of interest to you!
Here's the trick to make something so, so very boring (like alphabetizing) fun for your kids. Ask your child to list his 3 favorite TV shows (or PlayStation games or sports or Dora the Explorer characters or books or whatever he's interested in), and then alphabetize those! You'll be amazed how much more "fun" this is, when 1. he gets to pick what's being alphabetized, and 2. it's a subject that he's really into.
Make it harder or more older-kid-appropriate by having your kiddo list 5 or 7 or 10 items, or make it more interactive by having him list 3 and you list 2.
Every child is interested in something - figure out what it is and use that to your (and your child's educational) benefit!