My sons learned a very important life lesson today.

Luke learned that while it may be fun to throw rocks and soccer goals and welcome mats into the pool, it is most decidedly NOT FUN to fish them out when Dad sees them sitting on the bottom of the pool.

And Luke's brothers learned that if they see Luke throwing the above-mentioned items into to the pool, they should stop him immediately, because Dad will make them help with the fishing-out.  

No matter how cold it is.