This is a remix from two models: https://www.thingiverse.com/thing:1767446 https://www.thingiverse.com/thing:4725072

The original model (1767446) didn't snap closed...you would have to glue it (but very cleverly designed and great fit!) A remix from that model (4725072) added snap tabs and slots so the case would snap closed, but that model also removed some of the material from the front of the case to allow viewing of the microbit logo. I wanted to preserve that area on the front of the case for my students to add their name using the text tool in Tinkercad. So this is my remix of those 2 models...preserving the top of the case but also the snap tabs and slots.