3 ms·
One of my issues with tit is that the marbles run slightly too quickly to get young learners to analyze what's going on.
by ChicagoBoy11 7y ago
One of my issues with tit is that the marbles run slightly too quickly to get young learners to analyze what's going on.
- smoyer 7y agoHmm ... I guess it could have been designed with a stand that tipped it back to almost horizontal? Try going flatter than 30 degrees and you'll really slow it down!