The Third Annual Great Gingerbread Engineering Challenge Calendar Add to Calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML When: December 19, 2015 – December 20, 2015 all-day 2015-12-19T05:00:00+00:00 2015-12-20T05:00:00+00:00 Contact: Registration Events at The Children's Museum engineering family event gingerbread house Holiday Programming Holidays Click Here to Sign Up!