First, place your almond bark into a microwave safe bowl and melt (4 cubes will take around 1 min 30 sec).
While that is melting, break the pretzels into various sizes so that your bones are varying lengths.
Push on a mini marshmallow onto each end to make your bone.
Once melted, cover the sticks with the bark. This is a messy (but fun) task. Be careful as the mini marshmallows sometimes fall off, but you can just put them back on.
Place the bones on wax paper on a cookie sheet so they can dry.
When dried, you can 'break off' the drips and over cover and your bones will be ready to serve!