A child friendly puzzle with a simple cache at the end.
(5,2) (1,1) (4,4) (1,3) (2,3) (3,4) (4,5) (4,4) (2,1) (3,4) (4,2) (4,4) (2,3) (1,5) (2,2) (4,5) (1,1) (4,2) (1,4) (4,3) (5,3) (1,5) (2,4) (2,2) (2,3) (4,4) (2,1) (2,4) (5,1) (1,5) (3,4) (3,3) (1,5) (4,3) (2,4) (5,3) (2,1) (2,4) (5,1) (1,5) (4,4) (5,2) (3,4)
After you have decoded the message let the first number equal a, the second number equal b etc.
N50 5a.bc1 W002 4d.ef5
Nfx gur 'Thrfgf'.