Hit a small playground today - plus first plug in park

[OZ_IL]

Hit a small playground down the street from me. I MD'ed it last October and found just $1.00 in two trips. Wasn't expecting much but ended up with 28 pennies, 3 nickels and 5 dimes for $0.93 I also found a key and my first whistle

Before I left I figure I would do a quick scan where I saw some young'uns practicing from T-Ball a few days earlier. Ace read a quarter, but deep - 4 to 6'' down. What to do what to do. I do know you can MD in the parks, but digging No signs anywhere, and no people either Soooo I dug a plug and was just a teeny shallow on my dig, but dead center. Grabbed a 1989 quarter and left the place. Soil was in good plugging condition - no trace of where I dug it out.