There are already plenty of smartphone apps that can provide your kids with an interactive learning experience. The MERGE Cube & Headset let you take it to the next level. It is a VR/AR STEM toy that allows you to hold a virtual object in your hand and interact with holograms.
The cube is made of soft foam. It is compatible with most smartphones and tablets and comes with plenty of fun educational content. Simply download and launch the app, point the device at the cube, and the rest is easy.