Exploring New Robots

As the school year comes to an end, I'm looking into radically upgrading our robotics component of class. Here is one of the robots I'm looking to purchase this school year. They are made by Wonder Workshop and offer a variety of teaching resources.

I don't intend to purchase "Dot," but do want several "Dash" robots.

Do you have any experience with robotics and students? What would be your greatest teaching concern?

Thanks for sharing!