Donavan Allen doesn't collect coins, comics, or baseball cards like most kids. Donavan collects words - big words, little words, soft words, and silly words. Whenever Donavan finds a new word, he writes it on a slip of paper and puts it in his word jar. But one day, Donavan discovers that his word jar is full. He can't put any new words in without taking some of the old words out - and he want…