Hello, I'm looking for recommendations for a kid's tablet. My brother is autistic and when I try giving him a regular tablet, he would press the touch buttons on the cover and doesn't know what to do next. So I'm looking for something with no buttons at all on the cover except for the power. Thick silicone/gel case. No imprinted icons so I can edit the app list. If the icons are large that would be great because he is clumsy with his fingers. Thanks a lot for any help!