Only use Gatorade or G2 bottles for the sensory bottles they are a heavier plastic so they hold up better and keep a unison look so everything looks good. They come in different sizes you can find smaller ones for small hands if you need to.
Make sure to ALWAYS seal your bottles securely! I cannot emphasize this enough. Unless you want your bottle opened and the contents poured out. SEAL IT… with glue. Duct tape can be peeled off by a determined kiddo. Glue is much harder for them to open up.
Perler Bead Magic Discovery Bottle
Are you ready to give a lesson in Density? This is awesome and my kids thought it was magic. I had to explain this is not magic it is science!
First I added the water and some colorful gravel. The gravel was heavier so it sank to the bottom. Then we added some perler beads which are lighter than water so they floated to the top of the water. Next we added some baby oil, here comes the magic. The perler beads stayed between the water and oil line. What is awesome is that if you don’t add color yet visually you can’t really tell the difference between the water and the oil. I let the kids explore they shook the bottle, rolled the bottle and just watched as the perler beads stuck right to the middle.
Now you could leave it at that or you can add a little color. You have a choice now. If you use water colors or standard food coloring you will color the water. If you add frosting or lipid (fat) based food coloring like Wiltons frosting dye then you will color the oil. We decided to color the water. Its cheaper that way and kind of cool. The kids watched the color droplets fall through the oil. They were heavier then the oil. The fell to where the perler beads were then started to sink. The kids shook it a little and now they could see there were to different kinds of liquids!
For a list of ALL my amazing DISCOVERY BOTTLE IDEAS click the link or the image below