Book excerpt: Take some jars, frozen-food trays, plastic cups and spoons, salt, water, sugar, vinegar, and baking soda, and you have the basis for a chemistry lab. Make up a batch of sweet maple sugar candy or mouth-puckering pickles to demonstrate chemical changes in sugar and salt. With dozens of exciting experiments to work on in this book, using materials found around the house, you'll become a chemistry whiz in no time.