Click on the quarter note rests to change the rhythm to minim, quarter note, quavers, semiquavers, ti-tika and tika-ti. Click on play to play the rhythm. Click on clear to clear the rhythm and restart. Click on change percussion instrument to toggle between guiro and triangle.
The idea of this was from rhythm writer which is a great website but my students couldn't access the site from their mobile devices so I did it in scratch so that they could also create rhythms. [Update 28/9/21] Instrument has been changed to guiro and triangle