Such a good idea: Soda Bottle Drip Feeder for Vegetables. Bury a plastic bottle with small holes to water your plant's roots.brilliant in arid climates!
DIY Ikea No-Sew Window Bench Tutorial A super cool DIY Also, this becomes quite accessible for kids being at the bottom. Full Details: Ikea No-Sew Window Bench Tutorial
Log Bird Feeder - 23 DIY Birdfeeders That Will Fill Your Garden With Birds (my note: I haven't looked at all of these, but at least one is a terrible idea. The window birdfeeder -- birds could fly into the glass and hurt themselves.