Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
How can I open a Duplo train base 2961b without destroying it? It is not working despite fresh batteries. There are no screws.
This part wasn't meant to be taken apart,
but it is possible.
Source with more text and images
also this (very dark) video tutorial
and another video tutorial
Required, but never shown