I have a book of 64 games for teaching one to one or one to three children. I give this out as a freebee when people buy my main book 101 English Language Games for Children - which is for small to medium sized groups.
If you are teaching adults you can also use these games - the main thing is that they are best for elementary to lower intermediate pupils.
You can find out more through the site below.
All the best with your teaching, one to one is great because at least you don't have to worry about discipline, plus the extra money is always useful!
Shelley, Fun English Games