For a lively and long lasting activity this weekend, plant a window box – indoors. Fresh herbs are the most common way to dress a window and have fresh flavors to add to meal preparation. It's fun to watch small plants, or seeds, flourish and ultimately provide a harvest. The supplies you need are easily purchased at a hardware store or garden center. Here in the Northeast plants are dirt cheap since the growing season is just about complete. The other supplies you need are inexpensive too. Consider reusing or repurposing a bucket, pot, or other container for an interesting option. Beyond that you need some potting soil and that's it, you're ready to plant.
Easy-to-grow herbs include basil, parsley, oregano, and mint. The mint might grow wild so I recommend putting it in its own container.
If you're not used to tending plants, remember to water your new decoration – and occasionally add some fertilizer. (I managed to kill some healthy azaleas by over fertilizing a few years ago – let me (not you) be the one making the mistake by killing with kindness – literally.