One of the most popular (and oldest) hobby is coin collecting. People of all ages, including kids, love collecting coins from around the world. It's also a great investment, as some older coins are worth a lot money.
The best places to find older coins is at antique stores, coin collecting shops and the internet, but please be advised on what the correct price of a coin is as you don't want to over pay.
The only way to find the current correct prices for coins is to look in The Official Red Book: A Guide Of United States Coins, which is published by Whitman. The 2016 (69th edition) is now available to buy in book stores, coin shops, hobby shops or online at www.whitman.com/store.
A few months back, I was sent The Official Red Book: A Guide Of United States Coins 69th Edition hardcover ($16.95 retail). This year's book is edited by Kenneth Bressett (Senior Editor), Q. David Bowers (Research Editor) and Jeff Garrett (Valuations Editor).
The book gives you a quick introduction the world of coins in "Welcome To Numismatics." Then it jumps right into the coin values, which are divided into the following sections:
Pre-Federal Issues - Colonial and Post-Colonial Issues.