This is a great way to have your elf communicate with the kids, and with the Holiday markets gearing up, they will make a great addition to any craft table.  You can easily change the colours by object using the Global tab in the slicer.

 I ordered these magnetic Dry Erase boards in from Amazon. https://www.amazon.ca/dp/B09Z7SDS2X?ref=ppx_pop_mob_ap_share

They fit in nicely, but I would suggest a dab of glue to hold them in place.  There are 4 holes in the back to add 8 x 2 magnets, if you wish.  They fit in perfectly, but they will also require a dab of glue.  I purchased some magnetic dry erase markers at the dollar store, which include an eraser on the top.  You will also find some on Amazon.