my kids are really into interactive books lately, and i mean that in the analog sense. this new release presto change-o! (chronicle books) is incredibly fun, even for mom and dad. you start with the object written at the top, then you flip a few flaps, twist this and that, and presto change-o! you have the object written on the bottom.
it's a great way to open up little minds to the possibilities lent by good design and a little bit of creativity.
you can get a copy h e r e.