Last week we had another great STEM activity. The boys made goop and flubber. The kitchen will never be the same again, but they really had fun exploring what happened when they added certain ingredients and exploring the different textures.
They spent quite a bit of time popping into the bathroom, only room without a window, to see how the glow in the dark glitter glue worked and looked.
They really had fun comparing the two kinds of goop, one soft and one hard. They giggled themselves silly over how the “hard” goop was hard when you tried to stick your finger into it, but was runny when you put a handful in your hand.
The flubber recipe is simple:
- Two cups Glue (we used glow in the dark glue)
- Food Coloring
- Four tablespoons Borax
- Warm water
In one bowl mix in 1 1/2 cups of warm water, Glue, and food coloring. In a separate bowl mix in Borax with 1 1/3 cup of warm water. Pour the glue mixture into the borax mixture. Store in a plastic bag.
The hard goop recipe is:
- 1 cup of cornstarch
- 1 cup of baking soda
- ½ cup of water. (we ended up having to add another ¼ cup)
Mix with your hands. It is a little messy but feels cool. It will harden but soften to dripping when you hold and play with it. It cleans up with soap and water.
The soft goop recipe is:
- One part Liquid starch
- Two parts white glue
- Food coloring (we didn’t add the food coloring – too messy for kids to have to get home. Drip the starch slowly into the glue, mixing with hands until it becomes a workable ball. If it is too stiff, add a little more starch. Store in refrigerator in a covered container. It cleans up with soap and water.
You can get the glow in the dark glue here.
Get the gallon of glue for school projects here.
As an Amazon Associate I earn from qualifying purchases.