Folded card with marker illustration. Cover features illustration of Star of David inside heart under name "Aden." Interior features illustration of five balloons and words, "We want you to know that you are not alone. Sending warm thoughts and hugs to your community. Beth Chai."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Please know that our thoughts and prayers are with you and your congregation during this most difficult time. We here in San Diego pray for your healing. Jeanie."

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of a haloed dove flying in front of Noah's ark. Signed "Jack [last name redacted] 5th grade." The inside reads: "God Loves You. We will remember you. Jack Grade 5."

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of a haloed dove flying in front of Noah's ark. The inside reads: "Sorry for your loss. We will remember you. P.S. We will pray for you. Aden."

Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The envelope features an illustrated heart. The front cover reads: "Faith is the friend that comes along when things just seem to go all wrong." The inside reads: "To the Tree of Life, My thoughts and prayers are with yours. Nancy [last name redacted]."

Post-it note with handwritten message and illustration in blue and green marker. The message reads: "Nothing is lost on the breath of G-d." An illustration of a dove holding an olive branch against the backdrop of cresting waves or mountains.

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.

Post-it note with handwritten message in black marker. The message reads: "When we work together, hate can't win. -Max S."

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.

Weight covered in blue metallic cellophane, gathered and tied at top, affixed to a ceramic base. Gold and silver metallic streamers stem from the center. Tile has dirt on bottom.

Handmade card on white paper. Eleven trees, illustrated in blue ink, appear in the center. The number 11 appears below, followed by a heart. The card reads: "For the 11 people that died. Love, Coleman [last redacted]."

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside contains messages of love, prayer, and affirmation of God's goodness. The church's contact information is included on the back of the envelope.

Miniature New York State flag. Wrapped around stem of flag is a slip of laminated yellow paper reading, "In Memory of our Brother IRVING YOUNGER z''l -- To his family and community we pray Tanuchamo min hashamayim. May God in Heaven comfort you. The Principals, Teachers, Parents, Alumni, and Students of Magen David Yeshivah. Brooklyn, NY." Part of a series of 11 flags, each dedicated to one of the victims. Additional photograph shows the entire set of 11.

Post-it note with handwritten message in blue marker. The message reads: "May their memories be a blessing." Signed in Hebrew: [heart] "Miriam."

Card with photograph of ribbons laid out in a rainbow pattern. The inside reads: "God bless. Sandy and Cheri."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "To all of you at Tree of Life Synagogue, Deepest prayers and love reach out to each of you. May God's light and love bring you healing and strength. We are all one in our bonds of faith and goodness and HOPE! You are loved. Wendy [last name redacted]."

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside contains a prayer for God's grace and love. The church's contact information is included on the back of the envelope.

Laminated printed sign in blue and red ink on white paper. The sign reads: "Only love can conquer hate."

Multicolored printed card with message that affirms the value of kindness.