www.signingsmart.com and you can find other products there as well. Below are the flash cards that we ordered from the same company and these are pretty nice cards and fairly inexpensive as well. They are on a ring and have different themes to each pack. They show an adult and a child doing the sign.
Below are counting cans I bought at our local university book store. The university is a big teaching college so the book store carries tons of teaching tools and developmental toys. These are made by Learning Resources. These cans are great and Beau loves them!
Below are more cards that I purchased from University Book and Supply that are approximately 5x7 in size and show lots of different scenes and actions. You can use these in a variety of ways.