All we could do in class today was watch the loading symbol. Other sites worked. What's up? Even tried using only six kids. No luck.

Hi Gail - 
I am so sorry to hear.
We are not aware of any outage or issue affecting Voki yesterday or today.

Our systems are continuously monitored - so we would know if there was a problem.
Furthermore - we did not receive similar reports from other users.

My best guess is some local configuration change (at your school). 

Try again - at school (and at home) - and if you still see a problem call your IT department to advise.
Please let me know what you discover We are all disturbed when hearing of any bad experience affecting Voki users. 

Best
Gil
Voki Team