Exoskelton of Insect

Aha! When I pull the tendon, the leg moves!

What you can learn from this activity:

Learn exoskelton and muscle system of insect by in-depth observations of human and invertebrate bodys. Moreover, Fully understand how it works by making a exoskelton specimen using a crab leg.

By giving children a question why legs and arms move though they have never thought about it, they start having an interest on it. Then, start thinking why naturally. This will give a chance to creat a habit to think themselves to take any actions.

When and where to do: Anytime. Class room.


1. Think about how an insect move its legs. What about you? How do you move your arms and legs?

2. Understand how you move your arms and legs by studying from a picture book and actually touching your arms and legs.

3. Now let's look at how an insect does.

4. Today, we will do an experiment by using a leg of crab who has the same exoskelton as insects.

5. Let's draw a picture or write about the most interesting finding for you today.

6. Reflection.


Prepared by participants: color pencil, magnifying lens, water bottle, round nose pliers

Equipment by coordinator:




Picture book


Paper Board

Guide Boards

First Aid Box


Pot and stove


Legs of crab


Tissue paper

Plastic bag

Model of carb fare limb by Milk Carton @ @

SafetyF@First-aid Box, Checking of any dangers of trails and animals/plants.

Back to Activity Information

Pictures of the activity :

At Inamino Mizubenosato Park on Jan 13th, '08F


How an insect move its legs? How do you move your arm?


@Let's dissect a leg of crab.@


Can you cut some parts of exoskelton?


Take out crab meats (muscles!) while leaving tendons.


Slowly... (kids are like the time they eat crabs...)


Pull the tendon.


Do you see there are two tendons. One is to extend the leg, and the other one is to bend the leg. You can make a model by PET bottles.

Group Picture with crab leg exoskelton specimen!

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