Bird baths are really fun and many people make them in order to see if birds come to sit there or they buy birds of their own. You can make this in about 25 minutes or so and have a nice bath for birds or just have it for decoration...
DIY Concrete Leaf Bird Bath | FabDIY
Kleine Schalen aus Beton herstellen
DIY-Anleitung für Schmuckschalen aus Beton / diy tutorial: concrete bowls for jewellery, home decor via DaWanda.com
DIY-Anleitung: Kleine Schalen aus Beton herstellen via DaWanda.com