Pallet gardening, perfect for gardening within a small space. Always take advantage of empty vertical space--it will leave your balcony or patio looking clean, not cluttered. I frikn love stuff made of pallets!
Crate Bookshelves: Find a wooden crate at craft store, paint any color you want, cut in half with table saw, attach hanging brackets with screws and attach to wall. Immediate eye catching book storage for little ones.