not just targeted at 'critical thinking' (so includes maths and Logo programming) is Barry Newell's book Turtle Confusion. long ago i used this book with kids a

not just targeted at 'critical thinking' (so includes maths and Logo programming) is Barry Newell's book Turtle Confusion. long ago i used this book with kids aged 12. you can read about it here: http://constructingmodernknowledge.com/?p=1451 http://constructingmodernknowledge.com/?p=1451