--Audrey C. Rule and Cynthia Szymanski Sunal
How can you tell that something is old? A historical collection of everyday items (buttons, carpenter nails, magazines, fabric, food containers, etc.) "can provide concrete examples to help students construct a concept of change."
Links:
[1] http://publications.socialstudies.org/yl/0702/070204.pdf
[2] http://www.socialstudies.org/category/historical-period/general-us-history
[3] http://www.socialstudies.org/category/journal/social-studies-and-young-learner
[4] http://www.socialstudies.org/elementary
[5] http://www.socialstudies.org/ushistory