Earlier this week I noted that the Sippy Cups were breaking a barrier of sorts by offering a free download of "Seven is the New 14" on iTunes. Well, Dan Zanes has always been at the forefront of adventures in the new world of selling music here in the 21st century -- you'll remember his free greatest hits album offer from earlier this spring -- and he's quite possibly breaking a different barrier this weekend. This Saturday, June 13, for one day only, Amazon will be selling an mp3 version of his Grammy-winning disk Catch That Train! for just $1.99. Amazon has a daily cheap mp3 deal, but this is the first time I can recall them offering a kids' CD. It'd be a pity to not have the great album packaging, but for $1.99, I think you and your family will survive. You can go here on Saturday to take advantage of the deal. (Although, c'mon, you don't have it already?)