Found in 2 comments on Hacker News
GregBuchholz · 2012-08-28
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Looks like you can get it for $13.96 at Amazon, which would be less expensive than 40% off of $24.95 (depending upon shipping etc.).
http://www.amazon.com/Super-Scratch-Programming-Adventure-Pr...
Let me know if that works out for you! I've never worked with kids under 6 years old; that being said, I had to teach 10-15 kids at a time, and they did great. So I suspect a 4 year old with an adult's undivided attention should work out just fine!