This is not available on the support site, it is a an example app used in a training offered here
I'm going through the videos here. https://gettingstarted.mendixcloud.com/index.html I went through them without doing the accompanying steps the first time round but actually that was a mistake and so I suspect it is worth building the Bounce app along with the videos. There looks like there is a BounceTravel.mpk file in the support tools for each step. I can see there is a Creating Relationships (MPK File) for the Creating Relationships lecture. That is as far as I am the second time through the videos. I suspect for each step where there is some substantial work done in the modeller then there is a MPK file in the Support Tools.
Anyone can help me converting bounce travel project so I can open it with version 6?