With the World Cup coming to an end, this is probably a little late, but still may be of use to anyone who is watching to the end (even if their team is out)!
Date Made: June 2014
Approx Cost: £0 (recycled materials)
Approx Time: 10 minutes
Step 1: Things You Need
* drinks bottle
* duct tape
Tools you need
Step 2: Cut Bottle
Take off the lid (but keep it safe for the bonus whistle at the end!).
Step 3: Cut and Fit Balloon
Take your balloon and cut them bottom off.
Then feed it in to the lid and turn it back on itself to seal the top.
Step 4: Decorate
Use your duct tape in any way you want! I tried to make mine look like a football!
Make sure you wrap the duct tape around the cut part of the bottle so that there are no sharp edges!
Step 5: Make Some Noise
This is the water bomb balloon:
This is the big balloon:
I think the water bomb is the better one!
Step 6: Bonus Whistle
You need to position your hands as per the photo, creating a v at the top. I have shown it with one hand only to help show the hand position - just mirror the other hand.
Then rest your lips on your knuckles and blow in to the v. It may take some practice but once you get it right you can make a really loud whistle!
Here is a demo: