A concept or idea.

A system of parts that work together to create movement.

An object made from at least two parts that supports or protects something.

An object made of one part, like a block of stone.

... at school.

... inside the house.

... supervised by an adult.

A cut out part of a structure.

A mechanism which adds support to a structure.

A small flap that is used to join parts.

A unit or group of complementary parts that contribute to a single effect.

To fit several components together.

To take an object apart.