TL;DR
In tutorial, fill the toolbar with available items.What ?
When playing tutorials (for example the train tutorial), the items are not displayed in the toolbar. You have to manually open your inventory to access them. I suggest that all items in the tutorial should be added in the toolbar.Note: I'm very new to the game, but I think it's due to the changes in 0.17 that items are no longer in the toolbar in the tutorials. I didn't double check but I think that in 0.16 they were there.