we have also the school project [documented in Boero et al. (2015) book], but within Binder it raises an error, being turtle based (turtle Python class reqires tkinter, not consistent with Jupyter); to run it you can download and install locally SLAPP, from https://github.com/terna/SLAPP3
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To launch a new projet use again the ▶︎| button (or Shift+Enter), but only after restarting the kernel with the ⟳ button. Choosing Kernel/Restart & Clear Output you also have a clean restart.