The Time Capsule — Lurlene McDaniel

When they were six, twins Alexis and Adam wrote down what they wanted to be when they grew up, and put it in their teacher's time capsule. Now entering their senior year in high school and invited to a first-grade reunion, they are surprised to read what they wrote: Alexis wanted to "help people" and Adam wanted to be a fireman. But that was before Adam got sick and their family fell apart.

No one is prepared when Adam gets sick again, but this time things are different. Alexis discovers that the wishes they put into the time capsule weren't so far off the mark.