In the dinosaur's paw

It's the first day back to school after winter vacation, and Richard Best is off to a bad start. Who ever heard of a January without any snow? And as usual, he has already forgotten something--the ruler Ms. Rooney had told him to bring for dinosaur day. Luckily Richard finds a ruler in his desk--with a dinosaur's initials--and he's sure the ruler is special. And then he finds out it has magic powers.All his wishes begin to come true: Snow stars falling, he remembers to do his homework, and the b...