Likesilver and I obviously love our activity advent calendars as we keep popping up on the same threads! My kids are older than your DD but you can adapt things I"m sure.
This takes a bit of planning so you need to have your calendar/diary and plan around your busy and quiet days and other commitments like nursery concert, carol services, parties, visiting relatives etc.
here's some non-choc ideas I put on another thread.
We have activity advent calendar with a mixture of jobs as well as treats.
Jobs:
Make cards
Make paper garlands
Get house ready for Santa (clean and tidy rooms etc)
Go shopping with Dad to buy present for mum (Dad's present is always sorted before December!)
Wrap family presents and put under tree
Go for walk and collect greenery for table/mantelpiece
Lay table etc
The treats in the calendar can be
elaborate - panto or preschool theatre show, ice skating , see Santa, miniature railway, go to buy tree and go to pub for lunch
Easy- shiny pound coin pound coin to go to local shop to choose treat
really simple - hot chocolate, watch Christmas film, make paper snowflakes, play board game, read Christmas story
We have some little triangular boxes we tie to tree branches but you can just string envelopes from a piece of string. you may need to swap activities because of the weather or you can't be bothered!