The Configurable Marble Roller Coaster With MP3 Audio.

This is the marble roller coaster that can be assembled into 10 different configurations, and it has an attached audio mixer that plays music during a marble's journey around the track. The coaster comes with 10 towers, 12 pieces of track, and five obstacle pieces, including a magnetic hairpin turn, trampoline, and a 360 loop, that can be integrated anywhere into your design. Marbles (five included) are automatically lifted to the topmost tower--18" tall--by a magnetic elevator and released. The coaster includes a digital audio mixer that allows you to plug in your iPod or other MP3 player. The mixer connects to sensors on the coaster; when a marble rolls past one of the sensors, it triggers your iPod to play a song or one of the mixer's 30 pre-programmed sounds (in case you don't own an MP3 player). Mixer requires four C batteries. Ages 6 and up. The manufacturer has confirmed that this item meets U.S. Federal toy safety standards for lead. 40" L x 32" W.