The artist behind Wilmington's mysterious pop-up robots

A robot tells passersby to "Dream Big!" on South Union Street in Wilmington near Elsmere.

A robot spreads love on North Union Street as part of a pop-up street art installation by artist David Sanchez.

David Sanchez of Spaceboy Clothing poses with his "Dream Big!" robot on South Union Street in Wilmington near Elsmere.

Artist David Sanchez in his shop after completing work on one of his robots.

A robot clutching a red heart can be found on Pennsylvania Avenue near I-95 in Wilmington as part of a pop-up art installation by city resident David Sanchez

David Sanchez and his son Jet pose with a robot they created before it was installed on a utility pole along Pennsylvania Avenue in Wilmington.

A robot holding a heart over its head can be found on Martin Luther King Jr. Boulevard in Wilmington near Market Street.

David Sanchez and his son Jet, 14, prepare a robot as part of a pop-up street art installation, which can be found across Wilmington.

David Sanchez stands near his super-sized robot, which can now be found on North Union Street near Pennsylvania Avenue in Wilmington.