Super easy and looking great. Priced okay as bullyland figurines are cheaper than tonies. All in all ~10-11€ / bullycointagtonie. Lot of well known figures available.
Alternative other nice figurines from Schleich.
Just glue the figurine on the coin capsule with super glue and you are done 
And the best thing: there are already exempt images available which only needs to be linked.
Some examples:
