This is an experiment which can be done individually or as a group.
Popcorn kernels (optional)
Container with spout
Short glass container
The child will scoop a heaping tablespoon of baking soda into a glass container. A short glass or jar, such as a baby food jar, will be conducive to effective overflow. Once the baking soda is in, then in another container with a spout, will hold vinegar and a few drops of food coloring. This a great time to ask the children what they predict will happen. The final step is to allow the child to pour the vinegar mixture into the baking soda. The ingredients will mix together and cause an explosion that will bubble up and out of the container. When the bubbles are gone, the mixture must be emptied before beginning again. Try different shaped vessels for this experiment and adding some popcorn kernels. The kernels will dance inside the mixture, up and down for quite some time.
Making Goop:This sensory, hands-on experiment involves only three ingredients.
With this experiment, use a big bowl, or pot for the goop and have another pot of soapy water and a towel nearby for clean up. Alternatively, a sensory table is a great place for goop. Put the cornstarch into a big bowl. First, choose the color by adding a few drops of food coloring to a measuring cup full of water. The key for this mixture is to add the water slowly. If too much water is poured in, there is no turning back until the mixture evaporates over time. When the right amount of water is mixed with cornstarch, the texture will be hard on the bottom, with just a bit of moisture resting on top. When the mixture gets picked up, it will start to run down the fingers: a great goop mess. The goop is easily cleaned. The mixture dries and the corn starch is left and washes off clothes without any hassles. This goop mixture can be left on a shelf and brought back out at a later time. If it hardens, the children can have fun breaking it into little pieces, and then add more water to start enjoying all over again.