Today on In Case You Missed It: An engineer built a DIY musical instrument for people with disabilities, helping them create music with an eyetracking device. Two 3D-printed bits of technology caught our attention: One is for flesh, the other graphene aerogel. We are also reviewing a messenger app and a Kickstarter campaign for a speaker that basically makes us crazy.As always, please share any interesting science or tech videos, anytime! Just tweet us with the #ICYMI hashtag to @mskerryd.