This deceptively difficult puzzle box is based on an ancient wooden variety found in Mexico. If you don't know the trick to open this box its contents will remain hidden no matter how hard you struggle and pry. Sliding each of the three sections outwards simultaneously in one fluid motion allows you a look at what's inside. The box is 3D printed in white PLA and polished by hand for a smooth finish. 

https://www.etsy.com/listing/1031635117/puzzle-box