A: If you yourself are not participating in fishing, you do not. However, if you plan to join the children (and we encourage you to do so!), 24-hour licenses are available for $5.50. Children under the age of 16 do not require a license.
There are 86,400 seconds in one 24-hour day.86,400 because there are 24 hours in one day and each hour has 60 minutes and each minute has 60 seconds so 24 hours times 60 minutes equals 1440 times 60 seconds equals 86,400.However, a sidereal day (Earth's rotational period) is slightly shorter. The sidereal day is 86164.0916 seconds long.
Here's how I came up with that figure: To count to 1 billion would take 999,999,999 seconds, because the timer would start as soon as the person says one, one second would have passed when the person says two, and so on. [Thanks to Jacques de Wet for this observation.] Now, there are 31557600 seconds in one year (seconds*minutes*hours*days).