(There's no video for Blue Box for Rhapsody yet. Please contribute to MR and add a video now!)
Blue Box is the emulation layer for early releases of Mac OS X Server (1.0 to 1.2v3, named "Rhapsody", which is a hybrid of OPENSTEP from NeXT Computer and Mac OS 8.5.1) that allowed for legacy classic Mac OS applications to run under Mac OS X Server in a window. It's pretty much the ancestor of the Classic Environment in Mac OS X.
Blue_Box_For_Rhapsody.sit (32.81 MiB / 34.4 MB)
/ compressed w/ Stuffit
Rhapsody_BlueBOX_CD.toast_.sit (28.53 MiB / 29.92 MB)
/ Toast image, compressed w/ Stuffit
BlueBox.tar_.zip (25.7 MiB / 26.95 MB)
BlueBox.zip (25.8 MiB / 27.05 MB)
Contents of BlueBox CD / Zipped
Mac OS X Server 1.0 to 1.2v3 "Rhapsody"
Note: The Toast CD image is only readable under Mac OS X Server.
Emulating this? It should run fine under: SheepShaver