Marble Run Funnel Jungle Starter SetEnter the marble jungle! Get ready to build exciting marble track creations with the Ball Track Basic Pack Funnel Jungle! This exciting add on or stand alone marble ball track set is perfect for fast moving building fun as well as for exciting early physics lessons. This set can be adjusted and set up for maximum marble speeds. The speed tubes and funnel curves can be pivoted and placed at varying heights using the tube clamps. With the power pulser