I don't remember exactly where I ordered it, but I've seen it in several catalogues. These become familiar patterns to the students. In addition, they are learning songs and poems that use the duple patterns. This is the conversational solfege rote part. The teacher asks the class to stand.
Teacher speaks a special pattern with a neutral syllable or plays it on an instrument.
The last student standing is the winner. They are getting better and better at listening. Next they decode familiar patterns and songs. I might clap a pattern they have already echoed many times and have them say it back to me using rhythm syllables. Or I might tap the rhythm on someone's back and that person says the rhythm using syllables.