Why tigers see so well at night (for a 6-year-old)

Tigers can see very well in the dark. Here is why, in simple steps:

1. Big eyes: Tigers have big eyes that catch more light, like a big bucket catching more rain.
2. A shiny mirror in the eye: Behind a tiger's eyes there is a shiny layer (called the tapetum lucidum). It works like a little mirror and bounces light back into the eye so the tiger can see better in dim light.
3. Special light-catching cells: Tigers have lots of special cells that are very good at seeing in low light. These cells help them make out shapes and movement when it is dark.
4. Pupils open wide: At night a tiger's pupils get very big to let in more light, just like opening a door to let more light into a room.
5. Other senses help: Tigers also use their ears and whiskers to find things in the dark. Their whiskers feel things nearby and their ears hear small noises.

So with big eyes, a shiny mirror in the eye, special light-catching cells, wide pupils, and help from whiskers and ears, tigers can see and hunt well at night.

Remember: Tigers are wild animals and should not be approached in the wild.

Grammar check for the phrase: "tiger's sharp night vision"

The phrase "tiger's sharp night vision" is grammatically okay as a short label or title. It means the night vision that belongs to a tiger.

Other correct ways to say it depending on what you mean:

• "A tiger's sharp night vision" — talk about one tiger.
• "Tigers have sharp night vision" — say that all tigers (in general) see well at night.
• "Tigers' sharp night vision" — plural possessive, if you mean the night vision belonging to many tigers (less common than the second option).

So pick the one that matches what you want to say. If you just want a short title, "Tiger's Sharp Night Vision" is fine.