IKEA is one of the best stores, if for no other reason than the fact that their products are so versatile. You may walk out of the store with a table, and get home and turn it into something completely different!
Get some plastic animals at a thrift shop; saw them in half, paint them with spray paint or nail polish, and super glue a magnet to the back! How fun :)
Mason jars dotted with glow-in-the-dark paint! Great for creating lovely ambience inside or for decorating tables at night during an outdoor event!