Steps to reproduce:
0.) Got to the README for the C++ tutorial (or presumably the Python tutorial).
1.) Click on the "Open in Colab" link for 01.04.01 Vocabulary Types (or presumably any other example).
2.) Run the first three cells.
The third cell will fail with the following error:

Upon inspection, I realized that I was not running on a Colab instance with a GPU.

Once switching to a T4 GPU instance, everything was fine.
Action items:
- Add a check to the notebooks that will verify that the instance has a GPU and has CUDA installed, and provides a clear error and instructions to the user if the instance is unsuitable.
- Make links to the notebooks default to opening the correct kind of colab instance.