Chemistry of Fudge or other candies. Hey, what the heck, this is a great way to learn about saturated and supersaturated solutions and the effects of temp. on saturation. I usually do this with my high school chemistry students. Can be a bit pricey, but kids usually have no problem chipping in for fudge!
This site is great for Science Education. Sample of an "Atomic Attire" shirt featuring the element Helium. Website gives you strategies on how to organize this project in your classroom so that each student creates a unique wearable science fashion and tips for holding an "Atomic Attire Fashion Show"!
This is a four part EDITABLE ELEMENTS PROJECT with students' instructions, marking scheme and teacher instruction sheets. The usual element project either involves a poster, pamphlet or presentation on an element. This is a different project which requires more imagination, creativity and synthesis from the students. It is also more fun. Since I have moved towards this type of element project, students have created higher quality work and are more on task.
If I were to teach to chemistry I think these activities listed would be enjoyable before the winter break. One of the links leads to a word document in which the Chemis-tree activity is turned into a project. This project in particular uses ideas we've implemented in our classroom such as allowing the students to choose what will be on their ornament that pertains to chemistry(i.e. model molecule, famous experiment, famous chemist, etc) There are also guidelines that emphasize observations.