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.

Folded card with colored pencil illustration. Cover shows a whimsical landscape with a flower, smiling sun, and a fruit tree. Inside features a heart and purple circle surrounded by seven floating items, perhaps leaves or butterflies. Back shows a drooping plant with heart shaped leaves.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated Nov. 4, 2018 and reads: "Tree of Life, I give thanks daily to Yahweh, Father Abraham, Moses, and Jesus! We are all one with you, bonding with you, suffering with you, and healing with you! God help us all daily to Love, Joy, and Peace! Please let our pastor Karla Shaw know how we can help further! Shalom, Larry A. [last name redacted] Semper Fi America! San Diego, California."

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.

Folded card with marker illustration. Front and back cover features illustration of tree with heart superimposed on it. Interior features heart with X in center and words "We're all in this together. Things will get better. You're not alone."

Post-it note with handwritten message in blue marker. The message reads: "May you flourish in the future."

Post-it note with handwritten message with blue marker. The message reads: "Stronger Than Hate!" Illustrated with a heart and signed: "TR."

Card on red paper from three students [last names redacted] at Magen David Yeshivah High School in Brooklyn, Ny. The upper flap inside is illustrated with a large heart, surrounded by smaller hearts, and two Stars of David. A sun appears on the left, labelled with the quote: "after the rain, the sun shall shine through." The card ends: "GET WELL SOON! [Star of David]."

Handmade card with black and white stripes with a printed graphic with a blue Star of David overlaid with eleven candles and the message "Our hearts cry for Shalom" in the upper center. The Stronger Than Hate hashtag appears below. A whole was punched in the upper center.

Black and white photograph of the 1901 confirmation class of Tree of Life Congregation in Pittsburgh. Shows four girls and three boys in formal wear.

Card made by a student from the George Washington University Hillel. The front cover features the partial outline of a tree; most of the ink faded has faded by water damage at the memorial site. The inside, which also has partial fading due to water damage, reads: "I can't think of the words to say that could possibly make this better for all of you. Just know that we are all here for you, as a Jewish community sending love and strength your way. Though it may not seem like it now, we will all make it through this and work to make tomorrow a better day.

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."

Handwritten card from a student at Goddard Middle School in Littleton, Co. Cover features an illustration of an American flag and Israeli flag flanking a budding plant in the lower center, and a bilingual quote in English and Hebrew attributed to Ghandi in the upper center. In English, the quote reads: "Be the change you want to see in the world." The inside reads: "Dear Rabbi Jeffrey Myers, I am so sorry for your loss. It breaks my hear to hear about acts of Anti-Semitism. I am keeping you and your congregation in my heart and prayers.

Folded card on orange paper. Red and green staining. Due to exposure to the elements at the Wilkins memorial, the message on this card is no longer visible.

Floral tag from floral arrangement sent by Daniel Mulhall, the Irish ambassador to the United States, on behalf of the people of Ireland. The note is printed on a tag with a beige background from a local florist.

Post-it note with handwritten message in green marker. The message reads: "Love will always win! Don't lose hope. -Gabi Z.-"

Post-it note with handwritten message in blue marker. The message reads: "May your loved ones rest in peace. May your hearts heal and know that we are with you and will defend and love you."

Business card from Art of Steel, Ltd., a gift store located in Pittsburgh's Strip District neighborhood.

Folded card with colored pencil illustration. Front reads: "Kindness" and shows a girl asking "Are you okay"? The back shows a second girl, responding: "Yes, I am okay". Inside reads: "Dear Pittsburg[h], Our hearts go out to you in this sad time. May you find peace, and comfort, and a beacon of hope. Laurie and Michael."