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BrickLink - Part 30041 : LEGO Plate, Modified 6 x 8 Trap Door Frame Horizontal [Plate, Modified] - BrickLink Reference Catalog
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LEGO PART 92099 Plate Special 4 x 6 with Trap Door Hinge [Long Pins] | Rebrickable - Build with LEGO
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Lego Club Idea for Libraries--Build something with a trap door or secret passage. Great Lego Challenge!! | Lego club, Lego for kids, Lego challenge
![Amazon.com: Classic Trap & Gap 10" x 10" Blue, Green, Gray Baseplate 4 Pack by Strictly Briks | 2 Base Plates, 2 Trap Door & Gap Baseplates, 15 Stackers, | 100% Compatible Amazon.com: Classic Trap & Gap 10" x 10" Blue, Green, Gray Baseplate 4 Pack by Strictly Briks | 2 Base Plates, 2 Trap Door & Gap Baseplates, 15 Stackers, | 100% Compatible](https://m.media-amazon.com/images/I/81KhZgMapUL._AC_SL1500_.jpg)