A postcard-like image that says "Make musical code with Music Blocks" in the center. There are four other images. One of a teacher raising his hand in a classroom, one of a student looking at the camera, one of Music Blocks code, and one of Walter Bender and Devin Ulibarri posing in front of physical blocks.
https://files.mastodon.social/media_attachments/files/113/507/372/696/282/336/original/cb4fa92f7667ce0a.png