Here's a nice ligthbox of a question mark cube from super mario world !!
LED Controler : https://www.aliexpress.com/item/1005004712701330.html?spm=a2g0o.order_list.order_list_main.29.21ef1802yb0EAx
LED square : https://www.aliexpress.com/item/1005003901833984.html?spm=a2g0o.order_list.order_list_main.65.21ef1802yb0EAx
Print as shown
Brother Boxes https://makerworld.com/en/models/112575#profileId-120555 & https://makerworld.com/en/models/99183#profileId-105765 & Super mario Pipe holder : https://makerworld.com/en/models/101819#profileId-108453
Enjoy !