STEP 3 - Listen Up! Alexander Graham Bell's Talking Machine National Geographic Introduce your child to the

Introduce your child to the world of numbers

Lottie reconnects with an old flame

And it’s before Travis is noticed by Velveeta

Noah doesn't think he needs it

Three characters

STEP 3 - Listen Up! Alexander Graham Bell's Talking Machine National Geographic Introduce your child to theIt's 1876 and the whole country is celebrating the 100th birthday of the United States. The biggest party is in Philadelphia at the World's Fair, where the latest and greatest inventions are on display for all to see. Alexander Graham Bell is headed to the fair to demonstrate his invention a talking machine he calls the telephone. But will anyone come to see him at the world's most important science fair? And more importantly, will his machine work?