The letter grew until it had pushed all the other letters and pictures 
off the edges of the page. The loop on top shrank and became a head, while the 
lines sticking out the bottom developed into legs and began to scissor. "R is 
for Run," the book said. The picture kept on changing until it was a picture 
of Nell. Then something fuzzy and red appeared beneath her feet. "Nell Runs on 
the Red Rug," the book said, and as it spoke, new words appeared.