Robot Explorers Puzzle. The Robot Explorers 1000 Piece Puzzle from Galison features a photorealistic painting of robot toys by renowned artist Cesar Santander. Both nostalgic and challenging, this charming puzzle will appeal to the amateur and pro puzzler alike. The pieces come packaged in a sturdy and easy-to-wrap box, perfect for gifting. • 1000 pieces • Contains insert about artist and image • Assembled puzzle measures: cm.20 x 27" • Package measures: cm21x29.