For you long time readers you may remember the signing horses from way back in June 2007. It's remained one of my favorite posts and today's site is a similar but more developed concept.
On Incredibox mix a song by selecting up to 7 loops from the 14 available. When you've used a certain combination of loops it opens "bonuses" which are basically musical break downs with an accompanying visual.
Keep in mind when playing with Incredibox: the order in which you select loops effects how the loops that come after it sound. To get rid of a loop just tap on the guy performing it.