I always like to recommend this day trip outside of Prague at this time of the year as it is very appropriate.  A fun thing to do in October before the weather gets difficult is to go to the Gingerbread House in the little village of Ráby u Pardubic, approximately 118km east of Prague.  If you take the tour of the cottage to see beautiful gingerbread exhibitions and to watch bakers in period costumes show you how gingerbread is made, you will receive a tasty free sample!  – Open most of the year except Mondays but please go to their website for dates and to reserve a spot online as entrance is limited.