children and other visitors can learn how to responsibly interact with aquatic life. Weird and Wild The final hallway of the aquarium features several tanks with a handful of unique organisms. These include a South American tank, home to a Black Ghost Knifefish; an interesting relative to the Electric Eel which, too, can generate its own electric field. This is used to navigate its environment. A terrarium features several Blue Poison Dart frogs. In captivity, these frogs are not poisonous as they acquire their poison through bioaccumulation within their ecosystem. Another tank is home to the tiny freshwater Pea Pufferfish. To follow is a Piranha tank, an Axolotl tank, Cichlid tank, and Amazon tank. Finally is the tank holding a West African Lungfish, a primitive fish belonging to the lobe-finned fish class Sarcopterygii. In addition to having fleshy, boned appendages, lungfish also have a modified air bladder used to gasp surface air, a useful trait when considering their native oxygen-deprived waters. Les Paul’s House of Sound This interactive experience showcases the innovative and creative spirit of the legendary musician Les Paul. The exhibit allows visitors to travel along Paul's timeline to see his beginnings in Wisconsin to his travels around the world. Les Paul's House of Sound features three different areas: Les's Early Years, The Musician on the Road to Stardom, and Friends of Les Paul. The exhibit includes Paul’s Grammy Awards, the first Gibson guitar Paul produced, and the "Klunker" he used to produce top ten hits. Helen Bader Foundation's Great Lakes Future This large interactive model of the Great Lakes features flora and fauna that populate the Great Lakes, an interactive hydrologic cycle that allows visitors to control the weather, and a Sky Bridge that offers the opportunity to see the Great Lakes in a whole new way. The permanent exhibit was designed by Grace La and James Dallman of LA DALLMAN and was published in the Berlin monograph 1000x Architecture of the Americas. City of Freshwater & Badger Meter Liquid House This exhibit explains how the water used in homes eventually flows back to Lake Michigan. Other features of this exhibit include a look into Milwaukee Metropolitan Sewerage District processes, Milwaukee Water Works, and Milwaukee’s Deep Tunnel project, which reduces the amount of wastewater dumped into Lake Michigan each year. The permanent exhibit, comprising more than twenty interactive installations, was designed by Grace La and James Dallman