Here are 25 engaging science projects that creatively use pencils, suitable for various educational levels:

### Basic Projects

**Simple Circuit**:- Use pencils with graphite to create a simple circuit on paper, demonstrating how graphite can conduct electricity.

**Pencil Catapult**:- Construct a basic catapult using pencils, rubber bands, and a plastic spoon to explore the principles of levers and projectile motion.

**Magnetic Field Visualization**:- Use a pencil and a magnet to visualize magnetic fields with iron filings on a piece of paper.

**Pendulum Experiment**:- Create a pendulum using a pencil and a string to study the effects of gravity and oscillation.

**Balancing Pencil**:- Explore the center of gravity by balancing a pencil on its point with the help of additional weights or clay.

### Intermediate Projects

**Pencil and Rubber Band Harmonica**:- Make a simple harmonica using pencils and rubber bands to demonstrate sound waves and vibrations.

**Electric Generator**:- Build a small electric generator using pencils, wire, and a magnet to convert mechanical energy into electrical energy.

**Electrolysis of Water**:- Use pencils as electrodes to perform the electrolysis of water, producing hydrogen and oxygen gas.

**Pencil Kaleidoscope**:- Construct a kaleidoscope using pencils as the outer structure and mirrors inside to explore light reflection and symmetry.

**Thermometer**:- Make a simple thermometer using a pencil, a plastic bottle, and colored water to demonstrate thermal expansion.

### Advanced Projects

**Pencil Battery**:- Create a battery using pencils, copper wire, and vinegar to demonstrate electrochemical reactions and generate a small voltage.

**Electromagnet**:- Use a pencil wrapped with insulated wire and connected to a battery to create an electromagnet and explore magnetic fields.

**Pencil Maze**:- Design a maze on paper and use a pencil with an attached magnet underneath the paper to move a metal ball through the maze.

**Pencil Solar Cooker**:- Build a solar cooker using pencils and aluminum foil to concentrate sunlight and cook small food items.

**Water Wheel**:- Construct a water wheel using pencils and cardboard to demonstrate how flowing water can generate mechanical energy.

### Innovative Projects

**Pencil Bridge**:- Build a bridge using pencils and glue to explore structural engineering and load distribution.

**Graphite Circuit Board**:- Draw circuits on paper with pencil graphite and test conductivity by connecting to a battery and LED.

**Pencil Parachute**:- Make a parachute using a pencil as the payload to study air resistance and drag.

**DIY Stylus**:- Create a stylus for touchscreen devices using a pencil, aluminum foil, and conductive foam to explore touch technology.

**Pencil Compass**:- Build a simple compass using a pencil, a magnet, and a bowl of water to demonstrate Earth’s magnetic field.

### Practical Applications

**Pencil Windmill**:- Construct a windmill using pencils for the blades to explore wind energy and mechanical power.

**Seismograph**:- Create a basic seismograph using a pencil, a pendulum, and paper to record vibrations and simulate earthquake detection.

**Pencil Microscope**:- Build a simple microscope using a pencil, a lens, and a stand to magnify small objects.

**Pencil Top Spinner**:- Make a spinning top using a pencil and a cardboard disk to study rotational motion and balance.

**Pencil Periscope**:- Construct a periscope using pencils and mirrors to explore the principles of light reflection and angles.

These projects offer a variety of ways to explore scientific concepts using pencils, promoting creativity, problem-solving, and hands-on learning in science and engineering.