A   family that lives on the outskirts of Anchorage, Alaska decided to  build a sturdy, colorful playground for their 3 and 4 year old  sons. They  lined the bottom with smooth-stone gravel all around to avoid knee  scrapes and other injuries.   They finished building it one  Friday evening and were very pleased with the end  product.  
 
 The  following morning, the mom was about to wake up the boys and have them  go out to play in their new play center.  This is what she saw  from the upstairs window