MIT App Inventor is an intuitive, visual programming environment that allows everyone – even children – to build fully functional apps for Android phones, iPhones, and Android/iOS tablets. Those new to MIT App Inventor can have a simple first app up and running in less than 30 minutes. In this workshop, participants will train their own convolutional neural network (CNN) to play the game peek-a-boo. We will then play with the model on tablets/phones using an app built with MIT App Inventor.