A Modern Gray Mountain Mural in the Nursery—Love the color blocking technique for accent wall
Get the BIG Lanterns! Hang at different hights over table (food?) in a "Balloon Festival" type cluster
DIY Hot Air Balloon - perfect for child& room or play room
You mentioned the girls are owls at school.this DIY Owl Lantern would be cute for a classroom party! I see these lanterns at yard sales a lot.