There are a variety of new Lego blocks that are part of the concept.
In addition to characters and music, the starter kits - as well as the mystery bandmate packs - come with a number of critical new bricks called "beat bits".Unlike the characters which only have to be scanned once, beat bits have to be scanned at the start of every video. You can stack up to 12 on either side of your starter kit which you can then activate at any time with a tap.
You have to register each character separately before they can be used and if you swap out their head or legs, the scan won't recognise them.VIDIYOThe app uses your camera to search for a flat surface but has some problems with shiny, reflective or glass surfaces, which can leave your bandmates floating in midair. However, that's not nearly as big a hurdle to the fun as needing to scan a character surrounded by beat bits before every video.