This listing is for a 12" human skeleton assemble-it-yourself model, complete with display dome and "The Bones Book," all by Workman Publishing, ISBN #13: 978-0-7611-4218-8. For ages 8-12. Skeleton has never been assembled, and pieces have not been separated from the plastic things they were manufactured in, whatever those are called. :) This is a great educational project for biology, anatomy, or general science learning.