https://dualo.org/du-touch/
 
Funded with Kickstarter. I don't know how much they are but I they aren't too expensive I may try one. I think you can strap it on your tummy or set it on a leg. I just saw it on Flipboard and posted so this is all I know. Check out the video, the little arrow just under the picture on the website.
Available next November, looks like about $500 USD, there are some deals if you pay now but it looks like the better ones are gone, still there are some here (more info and pictures too): https://www.kickstarter.com/projects/63006320/dualo-the-new-musical-instrument-for-all/
 
Julien