this is 6 simple machines.

1. Pulley. A pulley is something that can hold stuff like bricks, metal, buckets of water and sticks.

pulley is useful for pulling things up and down.

2. Wedge - a wedge chops wood. An axe is a wedge.

How is a wedge useful? Wedge is useful for chopping wood.

3. Wheel and Axle. A wheel and axle is something that you need for a car.

4. Screw - A screw can hold furniture together.

5. Incline planed - an incline plane is a ramp to reduce the effort to raise or lower and object over a vertical hei ght.

6. Lever is a sand digger and if you put 2 together it makes scissors.

Lever is useful by holding stuff.