This is a two stage multicache.
Assume N 44 55 and W 93 27
The first stage is an easy find. Here you will find a sign. On the sign, find the age requirements to play on the playground in front of you.
Add the low age and high age together to get a single number. (A = low age + high age)
For the N coordinates, add 8 to the sum determined by the ages. Add this number to the stage 1 coordinates. (B = A + 8) (Final North = Original North + B)
For the W coordinates, add (lucky number) 14 to the number added to the north coordinates. Subtract this number from the west coordinates. (C = B + 14) (Final West = Original West - C)
Have Fun!