Featuring programs from hit series Brain Games, Duck Quacks Don’t Echo, and The Numbers Game, the National Geographic Engage Your Brain Collection combines science and entertaining, interactive experiments and games to reveal the amazing inner-workings of the "crown jewel" of the human body. While the Emmy-nominated Brain Games sizes up the human brain through mind-boggling experiments, optical illusions, and brainteasers, Duck Quacks Don’t Echo assesses the validity of weird, unusual and over-the-top hypotheses through a series of interactive, original scientific tests. The Numbers Game looks at how science and statistics may hold the keys to a longer, wealthier, calmer life.