Yes, there are several practical experiments and hands-on activities that can be conducted in Class 3 science. These activities help the students in understanding the concepts better and make learning more engaging and enjoyable. Here are some examples of practical experiments and hands-on activities for Class 3 science:

1. Planting Seeds:
- Students can plant seeds in small pots or containers and observe their growth over time.
- They can learn about the different parts of a plant, the requirements for plant growth, and the life cycle of a plant.

2. Water Cycle Experiment:
- Students can create a small water cycle model using a glass jar, water, and a plastic bag.
- They can observe the condensation, precipitation, and evaporation process and learn about the water cycle.

3. Floating and Sinking:
- Students can gather different objects and predict whether they will float or sink in water.
- They can test their predictions by placing the objects in a tub of water and observe the results.
- This experiment helps them understand the concept of buoyancy and density.

4. Making a Volcano:
- Students can create a volcano model using clay or playdough.
- They can then mix vinegar and baking soda to create a chemical reaction that mimics a volcanic eruption.
- This activity helps them understand the concept of chemical reactions and volcanoes.

5. Magnetic and Non-magnetic Objects:
- Students can collect various objects and test whether they are magnetic or non-magnetic using a magnet.
- They can record their observations and classify the objects accordingly.
- This experiment helps them understand the concept of magnetism and magnetic materials.

6. Identifying Different Materials:
- Students can gather objects made of different materials such as wood, metal, plastic, and glass.
- They can touch, feel, and observe the objects to identify their properties and classify them accordingly.
- This activity helps them understand the properties of different materials and their everyday uses.

7. Simple Circuit Experiment:
- Students can create a simple circuit using a battery, wires, and a bulb.
- They can learn about the flow of electricity, the concept of an open and closed circuit, and the role of different components in a circuit.

These practical experiments and hands-on activities not only make learning fun but also enhance the students' understanding of scientific concepts. They allow the students to explore and observe the phenomena firsthand, enabling them to develop a deeper understanding of the subject.