I love the idea of elf on the shelf and advent countdowns. I think I might combine it for the solstice. Have a fairy wreak a little havoc each night, but she also leaves a sun charm to hang on the solstice tree.
Yet another reason to save your citrus peels! Fruit rinds have a number of helpful uses around the house and they also make great DIY bird feeders. The best part about this feeder: it will be a hit with your kids.