We can provide precision-cut rigid foam stabilizers, and elastic straps, so that you can play at a comfortable volume for yourself or for therapy and small settings.
The JBL mini speaker shown is a nice unit for this. It charges from a USB port and gives surprisingly good volume for its size.

JBL mini amp strap is simple and lightweight

JBL mini amp, attached and ready to play

JA-2 mini amp

Danelectro HoneyTone has a great sound, and is just slightly larger than the others