A knot is a way of fastening something long and thin like rope, string or yarn by tying or interweaving. You tie your shoelaces with a knot, and if you want to tie your dog to a pole by his lead so he can't run away, you use a knot for that too.
A bow is a special kind of pretty knot that leaves two big loops, and is usually made of ribbon in hair ties or on a dress.
Scientific name: phascolarctos cinereus
Koalas are a marsupial that lives in Australia. Marsupials are animals that keep their babies in pouches. Koalas live in eucalypt trees, and eat only eucalypt leaves. Koalas move very slowly and spend most of their time asleep. Koalas have two thumbs on each hand and foot. A baby koala is called a joey, the same as a baby kangaroo. When the joey has left its mother's pouch, it will ride on her back for another six months. The closest relative of the koala is the wombat.
Scientific name: Brassica rapa var. perviridis
Komatsuna is a kind of leafy green vegetable. It is also called Japanese mustard spinach or Asian greens. It looks like small, tender leaves and stems.
People often use komatsuna in salads, soups, and stir-fry dishes. It is popular in Japan and is sold in many Asian markets. The leaves can be eaten raw or cooked, and they taste mild and slightly peppery.