Some kids (and adults) are just crazy about balls. There are footballs, basketballs, soccerballs, tennis balls, hackysack balls, racketballs, golf balls, rubber balls, plastic balls.....balls, balls, balls.
This large, camoflaged container, contains about 20 balls ranging in size from 1/2 inch to 2 inches. It would be nice to keep it a ball cache, but if you want to provide a little variety by putting in something else, that's OK too.
This is a great "linear" park with nice dirt trails, paved bike trails and water views. Foot bridges make it easy to get from one side of the water to the other. There is at least one cache nearby, and several others down the line each way.
The clue will seem cryptic even after you decypher it.