Let’s make an edible water balloon!


Preparation time: 10 min
Process time: 60 min


  • Calcium lactate
  • Sodium alginate
  • Bottle
  • Juice (Anything you want to mix. In this case, Mango Juice)

Tools and Equipments

  • Bowl
  • Measuring Cup
  • Ladle
  • Whisk
  • Spoon



Let’s make the solution first. Mix 250ml of water with 1.3g of sodium alginate.


Pour the solution in the bootle and shake it for about 10 minutes. Shake until all of the clumps of powder dissolve.

3Make another solution

Mix 1L of water and 1.3g of calcium lactate. Stir well until it looks transparent.

4Ready for “Cooking”

Prepare a bowl of water and the two solutions that we made.

5Drop into water

Pour sodium alginate solution into the spoon and submerge it into the calcium lactate solution. Stir gently. Scoop out the water balloon and drop it into the bowl of water.


Make together, and enjoy the competition to run fast!

7Make colorful water balloons

Use mango juice instead of water. Mix 250ml of juice and 1.3g of sodium alginate. Shake it for 10 minutes and repeat the steps that follow.

8Making small spheres

You can make small spheres by using a straw.



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