This theme was inspired by a popular station from my very first Imagination Station program. As part of an overall “Veterinary Clinic” theme I had set up a “Laboratory” station with a toy microscope and a simple experiment with water, vinegar, and baking soda that proved to be a hit with the kids. I knew then that I wanted to do a whole laboratory-themed Imagination Station at some point.
Program: Imagination Station - Science Lab
Ages: 2-6
Number: Up to 15-20 children
Budget: Around $30-50; some items purchased can be reused, others we already had on hand
Skills & Concepts: Imagination, creativity, expressive language, socio-emotional, early literacy, fine motor, cause-and-effect, observation, science vocabulary
Activities:
- Read-Aloud
I first gathered everyone in the children’s department for an introduction and read-aloud. I introduced myself and told them that before I became a librarian I used to be a scientist. Then I asked them what they thought a scientist is and does and discussed their answers, which led us to reading the book We Are All Scientists by Ellen Ochoa.
This is a great little book that introduces the concept of science and scientists, using short and simple text and relatable illustrations that portray a few different types of scientist. We followed that with a discussion of a couple of other types of scientists that were not in the book such as Paleontologist, which led to a discussion differentiating paleontology from archaeology.
I informed them that we were going to pretend to be scientists today and that there would be things for dress up and pretend play, as well as actual experiments to do. I explained one very important thing about science is safety and following instructions so that we stay safe and so that our experiments work right. I went over safety rules, including no eating, drinking, or putting anything in our mouths, keeping our hands away from our mouths, faces, and eyes; and washing hands afterward, then led them into the program room and explained the various stations.
[Print motivation, vocabulary, background knowledge] - Dramatic Play
I set up the market stand as a laboratory supply station and stocked it with some Erlenmeyer flasks that my supervisor happened to have, graduated cylinders and beakers that I had, test tubes that I purchased, child-sized lab coats and safety glasses that I got from a programming kit from the main library, and a toy microscope that was my daughter's. I added a sign with pictures and names of some of the scientific equipment, and placed a small table nearby.
[Imagination, creativity, expressive language, socio-emotional skills, functional print, vocabulary, background knowledge] - Discovery Zone
I set a variety of materials on a table - bugs, seeds, leaves, flowers, fossils, wood chips, and geodes - along with magnifying glasses and discovery tubes from Lakeshore Learning that I also got from the science programming kit. The sign on the table prompted them to observe characteristics such as shape, size, color, texture, structure, and weight.
[Fine motor skills, observation skills, sensory exploration, background knowledge] - Oobleck
I made a large batch of oobleck, which is a super-thick slurry of cornstarch and water (approximately one cup of water per two cups of cornstarch) that forms a non-Newtonian fluid. This means that it behaves both as a solid and a liquid, depending on the forces acting on it. If a strong force acts on it, such as hitting it with your hand, it feels like a solid, but when under very weak forces it behaves as a liquid. You can peel it away from the bowl and pick up a chunk that initially seems dry and solid, but as it sits in your open hand, it becomes a liquid and starts oozing through your fingers. This is messy, but oh-so-fun and fascinating, and relatively easy to clean up.
[Sensory exploration, vocabulary, background knowledge] - Lava Lamp
I have seen this done previously many times using Alka-Seltzer tablets, but I really didn’t want to use that due to expense and safety as they contain aspirin, which isn't even necessary for the experiment. I searched and discovered that you can get the same effect much cheaper and more safely using baking soda and vinegar.
For the small cups, we were using it only needed one-quarter teaspoon of baking soda in the bottom, then fill about halfway with either mineral or vegetable oil. Then add food coloring to vinegar and use pipettes to drop the colored vinegar in slowly. The colored droplets of vinegar are more dense than the oil so they will sink to the bottom, where they then react with the vinegar and produce bubbles of carbon dioxide which bring the droplets back up to the surface, where they sink again as the CO2 dissapates.
[Fine-motor skills, pincer grasp, colors, observation, cause & effect] - Color-Changing Cabbage Juice
Purple cabbage contains pH-sensitive pigments called anthocyanins that are purple at neutral pH, but change to shades of magenta or pink when in an acidic environment, and turn blue or green in alkaline environments. I gave them sparkling water, lemon-lime soda, vinegar, lemon juice, and baking soda to add to the cabbage juice to observe the color changes. (For more details on this and how to extract the pigments from the cabbage see my previous "Making a Natural pH Indicator" post.)
[Fine-motor skills, pincer grasp, colors, observation, cause & effect] - Microscopy
The science programming kit I borrowed from the main library also came with microscopes, so I set up one with a provided slide of the cross-section of a plant stem and the other with a slide of a honeybee wing.
[Fine-motor, vocabulary, background knowledge]
I would say this one was a hit, and I was very pleased with the turnout and how it went. Kids and adults really got into the different experiments and did a great job following directions! For once it seemed like everyone was doing and using everything the way I had intended, and there was plenty of pretend play going on as well. I was very pleasantly surprised at how little mess there was overall; even with all the various liquids used in the two experiments there were no big spills, and though of course there was some mess with the oobleck, it was not nearly as bad as I had expected.







































