I love what you are doing and I am involved in the same field as you are, education. I have tried using Google Cardboard with a project at a school one and it was awesome. Here's the link for you to check out (No, you don't have to upvote or follow or anything like that). Just thinking that it is cheap and fun way for children to learn.

https://steemit.com/steemiteducation/@alvinauh/bringing-the-world-to-a-rural-school-a-google-cardboard-lesson-plan

Keep doing your awesome work, my fellow teacher!