Rinse fools gold pieces with water to take off any dust.
Place the gold in the bottle.
Fill the bottle 1/3-1/2 full of hair gel.
Fill the rest of the bottle with water.
Secure the lid and it’s ready to be played with.
Tip: If you don't have hair gel you can use clear school glue. You may need to adjust the amount you use to get the viscosity right. You want the liquid to be thin enough the pieces can move through it, but thicker than water so they move slower.
If you are afraid your sensory bottle will be opened you can use super glue to secure the lid closed or add tape around the lid so that it can't be twisted and opened.