To be or notch to be | New Elementary: LEGO® parts, sets and techniques
Sets that have 2413: Wing 4 x 9
LEGO Parts 2413 (2pcs) Wedge, Plate 4x9 Choose Color | eBay
Wedge, Plate 4 x 9 without Stud Notches : Part 2413 | BrickLink
Amazon.com: LEGO Creator 3in1 Cozy House Toy Set 31139 Model Building Kit with 3 Different Houses Plus Family Minifigures and Accessories, Summer DIY Building Toy Ideas for Outdoor Play for Kids, Boys