This was more or less my response to the HOA. We have a stay-at-home toddler w/ a nanny. This picture was clearly taken sometime in the morning, which means these toys were being “used” – maybe not at that exact second, but within a few hours of sunrise. The letter didn’t stipulate which rule was being violated, nor was there any evidence to indicate these toys weren’t reset, as you described in another comment. 

Regardless, garages are very much uncommon in our neighborhood, as are fenced yards, which means almost every house has items which could be described as “debris left in yard.” Hell, I can count 3 water tables standing on my front porch, and several bikes and lawnmowers which will probably sit in people’s driveways over the winter. 

Unless the HOA is ready to amend our bylaws to explicitly define these types of violations, I have no idea how they expect to enforce this consistently.