Sing into the microphone and your SpongeBob Singalong friend will sing everything they hear in their own fantastic voice. Collect and connect them all to one Mic to create a group to hear them sing together in perfect harmony. There are four Singalongz to choose from and each comes with a special microphone, which you can sync with your pet using the Sing – A – Link Star to create the magical link or you can connect all four to the one microphone and join the Singalongz group.