Halloween Yard Ideas Diy . To decorate your banisters, perch a group of owls on top of them. These awesome diy tombstones are from ‘ sawdust girl ‘. Outdoor Halloween Decorations Ideas To Stand Out from residencestyle.com Spook your friends with halloween banister owls. Make this version of a halloween tombstone from foam insulation sheets with this tutorial from ‘ instructables ‘. 50 diy halloween garden ideas 1.