This site contains free exercises, flash cards, worksheets, mp3 recordings, and teacher resources provided by Carol Krueger, author of Progressive Sight Singing.
These are the activities we couldn't access during the session due to the Wi-Fi in the conference center. There are two blobs games, which are shown first on the site. The second blob game has the option of using the piano pitches instead of the blobs (see the "options" button after you start the game).