Folded card with crayon illustrations. Cover features three human figures. One is standing and smiling. Second is prone and frowning. Third is floating with face obscured. Several balloon-like shapes float toward a colored band along upper margin. Interior reads, "We are here. Right by your side. Keep fighting and good things will come." Back reads "2018" above prone human figure.

Post-it note with handwritten message in black ink. The message reads: "Etz Chaim Hi. It is a tree of life for those who hold fast to it."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a pineapple with floral and geometric motifs. The back contains a handwritten note with a quote from the nineteenth century American poet Emily Dickinson, as well as the stock signature: "From your friends at West Allegheny Middle School."

Handwritten card in colored pencil on paper. A blue and green colored globe, surrounded by alternating male and female stick figures in purple, red, and yellow, appears in the center. The globe is inscribed: "We are thinking of YOU!!" The upper and lower edge of the card reads, in Hebrew: "Am Yisrael Chai"(the People of Israel live). Four Stars of David appear on either side of the globe. Signed: "Hannah S. 8th grade at Yeshivat Noam."

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Note addressed to the victims and neighbors of the October 27 attack.

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "You Got This" surrounded by a border with a grapevine pattern. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "Be Strong" and other floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Card with colored pencil illustration. When opened, the card features an illustration of a tree and grass. It inscribed with the following message: "We are sorry for your loss" and the word "love" surrounded by a heart.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a bird feather with floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear Friends at Tree of Life Synagogue, My heart hurts and aches for the tragedy and violence you have seen. I have thought about it many times as I sit in my own church with family and friends. May God wake with you always, ALL ways, may His breath be in yours, may you heal and grow together from this horrible loss. With much love, Katie [last name redacted] from PLCPC.

Folded card with marker and colored pencil illustration. Front and back cover feature spread of tree emerging from blue field. Interior features scribbles and name "Veronica." Additional message reads "Our hearts go out to you at this tragic time, along with our wishes for healing. The Beth Chai Congregation of Greater Washington, D.C."

Envelope containing letters written by members of the Point Loma Community Presbyterian Church in San Diego, California. The envelope is labeled with a piece of paper reading: "Letters for Tree of Life Synagogue."