Clear polyethylene bag/ zip lock bag.
1. Pump air into a balloon and tie.
2. Put blown balloon into a zip lock bag or wrap balloon with a clear bag.
3. Apply glue at the bottom of of the gallon and attach buttons one after the other.
4. Arrange them in a at that the most attractive colours will be at the top of the ballon.
5. Allow to dry for about 10-15hours.
6. Using a pin, burst the balloon and trim the clear bag to the same level with button.
Watch video below:
Where to buy colourful plastic buttons: https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.ca%2Fulk%2Fitm%2F222504909570