Make a Cold & Hot Pack

Reach into your kit & pull out the bag that says Experiment 18. Take everything out of the bag and place it around your white mat.

Open up one of the waterproof cellphone pouches. To open, first flip open the two lock tabs located on the side and then open the top.

Use the white tabs on the inside to help open the pouch, then reach in and grab out the paper cellphone. We don’t need it for this experiment.

Grab the tube of Ammonium Nitrate and pour the entire tube into the empty pouch.

Next, take one of the empty bags and using the faucet, fill it up 3/4 of the way with water. Carefully close the top to seal the bag.

Take the bag of water and gently place it inside the waterproof pouch. Ask your adult sidekick to help hold the pouch open if you need extra hands.

Now close the pouch. To do this, first make sure the tabs are open, then line them up with the holes on the top, they should fit together. Last, flip the tabs down to secure the pouch.

To activate your cold pack, simply squeeze to pop the bag of water, then shake the bag until it starts to get cold. The more you mix the colder it gets.

Next, open the second waterproof pouch just like before and remove the paper cellphone from inside.

This time we are going to use the tube of Calcium & Magnesium Chloride. Pour the entire tube into the empty pouch.

Just like last time, fill up another bag 3/4 of the way with water but this time be sure to use cold water. Then, drop the bag of cold water into your pouch and close it securing the tabs.

To activate the hot pack, squeeze to pop the bag of water and then shake quickly. If the pouch gets too hot, just put it down for a minute or two and then you can pick it back up again.