Premium Cuckoo Nest STC #21 - Handcrafted Wooden Birdhouse for Garden & Outdoor Decor - Perfect for Backyard, Patio, and Nature Lovers

This clever puzzle by master puzzle designer Stewart Coffin possesses a satisfying solution, once you've found the "key"! Numbered 21 in Coffin's catalogue of designs, the Cuckoo Nest is one of his more celebrated, replicated, and developed-upon designs. 

Assembly marks in the master's hand are visible once you begin taking the puzzle apart.