Instruments for Older Kid Class

The older kid class (4.5ish and up) learns drum beats and melodies on the keyboard. For the drum beats, any drum will do, as long as it's not too loud.  

This bongo looks like it won't be too loud (no ports underneath): 

If you really want to go for it, this is the drum set I recommend (You could bring the just the snare drum to class, or the whole drum set if you like!):

For Keyboards, melodicas are great fun, extremely portable and rather affordable, this one has 2 mouthpiece kits:

And/or a keyboard if you can and don't mind bringing...