I designed this so I could make an advent calendar for my family instead of buying a new one every year. This one allows me to buy small things like candy or clay/ playdoh and truly make the calendar something my kids actually enjoy. No more disappointing surprises! I also made it resemble a book for easy storage options. It holds together with 6 - 5x3mm magnets that you place in after the print finishes.

Each piece prints separately so you don't need an AMS. The hinges  snap together (it may take some wiggling/ force but they are fairly strong) 
The decorative “book pages” glue into place and are totally optional. You could also easily hand-paint this design to make it more custom.