Making a baking soda volcano is an exciting way to demonstrate chemical reactions to young children. To make a simple baking soda volcano, bury an empty 2-liter bottle into dirt, leaving the opening uncovered. Place a funnel into the opening, and pour in 3 cups of baking soda. In a small bowl, combine 2 cups of vinegar with 5 drops of red food coloring. Pour the vinegar into the funnel, pull the funnel out of the bottle and watch the volcano explode with "lava."
Terrarium's can teach young children that plants need soil, sun and water in order to grow. To make a simple soda bottle terrarium, cut two soda bottles in half, then discard the tops. Fill one of the bottoms with soil, small plants, rocks and moss. Water the soil well, then place the other bottom on top of the first one. Use your fingers to overlap the edges so that the top sits securely onto the bottom. Place the soda bottle terrarium in a sunny location.
Making a seed chart can show young students how different plants will have different looking seeds. To make a seed chart, place a paper plate onto a flat surface. Divide the plate into twelve sections using a marker. Glue twelve different seeds to the plate using craft glue, then write the names of the plants above the seeds. Draw small pictures of what the seeds will turn into underneath the seeds.
Students can learn how light can bend by creating a water rainbow. Fill a glass with water. Locate an area in the room that has direct sunlight. Place the glass of water onto a tabletop, allowing half of the glass to hang off of the table. Place a piece of white printer paper onto the floor directly below the glass. When the sun shines through the water in the glass, a rainbow will be created from the light bending in the water. Students can identify the different colors that are contained within a ray of white sunlight including red, orange, yellow, green, blue, indigo and violet.