This Set Includes: Birds to Aircraft (19) , Cat Claws to Thumbtacks (19) , Cat's Eyes to Reflectors (19) , Kingfisher to Bullet Trains (19) , Lamprey Eels to Robots (19) , Porcupine Quills to Needles (19) , Burrs to Velcro (19) , Woodpeckers to Helmets (19) , A Better Electronic Invention (19)