Pull open the closure strips at the "belly" of the MouseFull refillable catnip toy. Open fully, with closure strips OUTSIDE the toy.
Open catnip-dispensing tube and fill toy with about half of the catnip.
Carefully fold hook and look strip closure back INSIDE toy, making sure no leaves are attached to strips. Keep seam tag outside toy. Press firmly to seal. Closure locks tightly and is "cat proof" when filled according to directions.