Animal Skeletons (KS2): Fun Facts And Activities

Two kids sat with their parents on the sofa learning about animal skeletons on their laptop.

Image © Pikwizard.

Skeletons are hard structures that help support and protect the body, and they can vary a lot. Humans have a skeleton on the inside of their bodies, but some animals, like crabs, have external skeletons.

Animal skeletons are part of the Year 3 science curriculum. These great resources will help out any parent who wants to support their KS2 child's learning at home while having some fun along the way.

Check out this guide to animal skeletons below, for some fun facts and creative activities alongside the key information that your child needs to know on the KS2 curriculum.

What Is A Skeleton Made Of And What Does It Do?

Skeleton of an animal on all fours bending down.
Image © Ryan Somma

Skeletons are large structures and they have important functions. They help protect an animal's soft tissue and organs, which are important parts of the body, such as the heart. They also allow living things to move. The skeleton also provides a structure for the body; it is the reason that humans can stand up!

Skeletons can be made up of different materials. The skeletons of mammals, which are warm-blooded animals, are made of bones. Each bone acts like an anchor for the muscles in the body, which enables movement in animals. Bones are made of a hard white substance called calcium and another substance called collagen, which is softer.

Some animals have skeletons that are not made up of bones. Arthropods are a group of animals whose skeletons are made of a substance called chitin, which is a hard protein material. This gives the creature protection and support. Arthropods include animals like crabs and spiders. Skeletons made of chitin are found on the outside of the body, and they are called exoskeletons. Skeletons that are found on the inside of the body are called endoskeletons.

Some creatures have a hydrostatic skeleton. These are made of fluid, which is put under lots of pressure and forms the animal's structure. An example of an animal with this skeletal structure is the starfish.

Vertebrates And Invertebrates

Animals who have a skeleton are either a vertebrate or an invertebrate. Vertebrates are animals which have a spine (a backbone) as part of their skeleton. Many animals are vertebrates, including mammals, fish, birds and reptiles. Most vertebrate animals have endoskeletons.

Invertebrates are animals who have no spine as part of their skeleton. Most invertebrates are exoskeletons or hydrostatic skeletons.

Skeleton Differences

The skeleton is often very different depending on which animal it belongs to. This is because it has adapted over time to suit the animal and its needs. For example, fish have a very flexible spine because they swim, and this allows them to do so very easily.

Large land animals including humans have adapted to have long bones in their arms and legs, so they can run fast. Some land animals like kangaroos have shorter bones in their front legs, and longer ones in their back legs, because this allows them to jump very high.

Fun Skeleton Facts For Kids

A cat's skull against a black background.
Image © Unsplash

1.98% of the world's creatures are invertebrates.

2.Bats and birds have hollow skeletons so they are lighter. This makes it easier for them to fly.

3.Endoskeletons grow with an animal and are permanent. Exoskeletons are often shed once the creature gets too big for it, and a new exoskeleton grows to replace it.

4.Giraffes have seven bones in their necks, which is the same number as humans.

5.Moles have very big foot bones which allow them to burrow in the ground.

KS2 Skeleton Activities

Why not try a fun, educational activity to further your child's learning?

One great activity for children is making their very own skeleton. You can easily find sheets online with pictures of the different skeletal parts of all different creatures. Simply cut these out and stick them together to form your very own paper copy of a skeleton.

Top Tip: Instead of using glue, your child could use split pins to attach the different skeletal body parts together. This will make it look like your child's creation has muscle movement.

Another great idea is to make some delicious animal-shaped cookies. Kids could use white icing to illustrate the bone structure of their chosen animal.


Written By

Mia Shindler

Mia is a student from London who loves spending time with her family and two younger siblings. As a History student, she especially enjoys family days out to museums, and loved reading all about the past as a child. Her favourite historical book series as a child was The Lady Grace Mysteries by Patricia Finney. Mia also loves exploring London’s restaurants, theatres and parks, and finding new and exciting things to do in her local area.

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