Feed them Puffins, lots and lots of Puffins. Go to the day care center and give them the Pokemon that you want to convince is real. Take him out then put him in the first position in the party....
If you mean "do they," I would say rarely. I see bicyclists blow through stop signs all the time. If you mean, "Are cyclists required to obey traffic signs," the answer is yes. Cyclists are required...
stop giving it water and/or foodyeast will also kill itself by fermentation; in a closed system the yeast will consume all it's food resources and produce enough alcohol to kill all the yeast cells.