Marble Genius Marble Run Ocean Sounds - Lights and Sounds Accessory Set plus Free App

Bring your marble run to life with our patented Lights & Sounds pieces. These 2 Ocean Sounds pieces will transform your marble run with 9 different sounds. When the marble rolls over the trigger, lights flash and a random ocean sound plays out of the large speaker. The see-through pieces allow your curious child to see the inner workings of each piece, inspiring imagination and learning. Each piece includes an on/off switch, as well as 3 button cell batteries.