Hugh Tracey Chromatic Celeste Alto
This is an option for playing chromatic with medium or smaller hands.
The board is 3/4 inch thick and this is the kalimba that Sharon plays in the YouTube video. This one is definitely better for small hands - meaning many women and also many men (ie, not just children).
Each of these kalimbas come with the built in pickup.
Listen to this sound clip:
The chromatic kalimba comes in G on the front, with the notes out of the scale on the back. If you want it tuned to C on the front, that takes work and will cost an additional $10.