These puzzles are meant to be used outside for children ages 2.5-6. They should be sanded on both sides and have nice rounded pieces. They can range from 4 pieces total to 8-10 pieces total to give some range on how difficult they are. I haven't figured out yet how to make sure they are easy to keep together and not mixed up, maybe a box for each one or some kind of color coordinating without loosing the beauty of the natural wood??
YOU3DIT COMMENTARY:
We've moved this project to fabrication quote as this simply would require a random jigsaw pattern which we'd leave up to the fabricator. Also, use these to quote your work regarding the materials: https://www.amazon.com/Natural-Basswood-Weathered-Outdoor-Centerpiece/dp/B01NAEB4N1/ref=sr_1_6?ie=UTF8&qid=1512674575&sr=8-6&keywords=tree+slices
Suppose this could be done with a waterjet cutter or a simple manual bandsaw. Trick is getting those tight turns