Take the small containers and the marker. Label the containers for the number of days your child is going to do the project. (Day 1, Day 2, Day 3, etc.) I recommend empty baby food jars with lids since the day can be written on the lid. Fill the containers about half full of water – cold or room temperature, not hot.
For each day of the project, drop a single gummy bear into one jar and close the lid. I sorted my gummies by color, but this is optional.) Store containers in a cool space so that the water in the container does not get too warm and melt the gummy bear. (I stored them in the refrigerator, but they can be stored anywhere safe from heat and breakage.) You don’t have to worry about changing the water since the jar has the lid on.
Each day that the gummies are in water, they will grow a small amount by absorbing the water. By labeling the containers, your child can show the progress of the growth.
It is recommend doing the project on a day-to-day basis for one to two weeks. If your child wants to show the size of a gummy after one or two months in the water, I suggest doing only one gummy bear and labeling the jar with the date rather than trying to have a month’s worth of little containers to keep up with.
The picture shows the size of a gummy bear after a month in the water (compared to a regular gummy bear).