Home made slime!

Fancy getting messy this Easter? Why not make your own slime and experiment with different colours. This activity is fun for all ages and will provide hours of fun for everyone. Check out this post on how to make your own slime at home.

To get kids excited about science we have put together lots of simple activities that you can try at home with children. This experiment looks at how to make fun slime. I first came across slime when I was at school and loved it! I was extremely happy when we were given the opportunity to make our own slime as it is something that I have always been entertained by for hours. If your kids love getting messy this is a must for the holidays!

For the activity you will need: white glue, Borax, water, two bowls and food colouring. The first step is to weigh out and mix together 4oz of glue and 4oz of water. You will also need to add the food colouring to make the slime colourful.

You will need...

You will need…

The next step is to mix together 1 tsp of Borax and 8oz of water in the other bowl.

Slime steps

Slime steps

 

Then you need to add the two mixtures to one bowl. Slowly sir together to minimize the amount of lumps.

The slime will begin to form immediately; stir as much as you can, then dig in and knead it with your hands until it gets less sticky. (No one makes slime without getting a little messy!)

The science bit:

The glue has an ingredient called polyvinyl acetate, which is a liquid polymer. The borax links the polyvinyl acetate molecules to each other, creating one large, flexible polymer. This kind of slime will get stiffer and more like putty the more you play with it.

 

Bouncy Balls

As you now have lots of Borax left over why not try creating your own bouncy balls (shame to let it go to waste)images123365

What You Need:

  • 1 tablespoon white glue
  • 1/2 teaspoon borax
  • 1 tablespoon cornstarch
  • 2 tablespoons warm water
  • 2 plastic cups
  • 2 wooden craft sticks
  • Food coloring

What You Do:

  1. Pour the glue into one of the plastic cups. Add a few drops of food coloring to the glue and mix with one of the craft sticks until your desired colour is achieved.
  2. In the second cup, combine the water and borax together and mix with the second craft stick. Stir until dissolved.
  3. Add the cornstarch and 1/2 teaspoon of the borax solution to the glue and let stand for 15 seconds.
  4. Stir with a craft stick until fully mixed together and the mixture becomes very difficult to stir.
  5. Mold the ball in your hands. It will be sticky at first but will become more solid as you roll it in your hands.
  6. You now have a bouncy ball. Try bouncing it. How high does it go? Store your ball in an airtight container so it doesn’t dry out and crumble.

 

Bouncy Balls

Bouncy Balls

The Science bit:

The white glue contains polyvinyl acetate, a strong and flexible polymer that gives the ball strength. Cornstarch contains amylopectin, a polymer whose shape is best described as ‘branched’ – it sticks out like the branches of a tree – and gives the ball the property of elasticity. Elasticity allows the ball to return to its original shape after being compressed or stretched, such as hitting the floor. So instead of splattering everywhere, the ball bounces back up. The borax is needed to help the glue and the starch stick together. This connects the two polymers into a net like formation, keeping the ball from crumbling or becoming slime when it is bounced.