The Vibrafun app shows you how to play several popular songs on the vibraphone, marimba or xylophone. Featured songs includes Ode To Joy, My Bonnie Lies Over The Ocean, Greensleeves, Oh Susanna, Wheels On The Bus and Danny Boy, among others.
Upgrade to full version to get a children's xylophone and a marimba instrument in addition to the vibraphone already included. The upgrade also removes the in-app advertisement.
Key sizes are flexible, so you can increase or decrease them to fit best possible to your screen and device. In addition it is possible to record, save and load recordings. It also has vibrato feedback on the keys for more realistic feeling.
Vibrafun is playable with DIY mallets which you can easily make yourself. See video for a demonstration: