Make a Portable Soda Grenade

Many grenades and other explosives require lighting a fuse in order to for them to detonate. However, this type of grenade does not need to be lit in order for it work, making it portable and available whenever it is needed.

Things You'll Need

• One kinder surprise plastic egg
• Baking soda
• Cling film
• Vinegar
• Cellotape
• String (15cm)
• Pin

Steps  

1. Make a hole on the top of the kinder plastic egg with the pin. Most of the eggs already have a hole.

 2. Fill the bottom half of the egg 3/4 of the way full with vinegar. Be careful not to spill any. Cover the open end of the bottom half with cling film, leaving some slack in the centre. Now the vinegar should be sealed.

3. Gather the cling film slack in the centre and tie it with the string. When the grenade is complete, pulling the string should break the cling film and allow the soda and vinegar to mix. 

4. Feed the top half of the string through the hole in the top of the egg.

5.  Heap 2 tbsp of baking soda on the cling film, then close the egg.

6. Cellotape the closed seam shut. 

7. Now you will have a sealed egg with some string sticking out of the top. Stick a strip of tape at the base of the string 'pin'. This will stop the gas leaking out of the hole when the soda and vinegar combine.

8. When ready to use, jerk the string 'pin' to break the seal, give the grenade a quick shake and throw. If constructed properly, the grenade should not break into shrapnel, but split along the seam and violently spray the inside mixture outwards. 

9. Enjoy your grenade! If you are a budding soldier, carry around at least two grenades with you BB gun when going on patrol or playing.

Tips

• Do not seal the seam shut with too much cellotape. This will prevent the grenade from exploding properly and will either rupture or shrapnelise the grenade, so you can't use it again. One layer of cellotape should be enough.
• The cling film may look a bit thin, but adding more than one layer will prevent the string 'pin' from wroking properly and it will not allow the components to mix properly.
• Make sure you tie the string to the slack securely, otherwise when you pull the string 'pin' the string will just slip off the slack and will result in a dud grenade

Warnings

• Do not use indoors or near any living things.
• Do not throw the grenade onto a hard surface like tarmac or concrete as this will crack the grenade and release all the gas.
• When shaking the grenade, shake it for 1 second otherwise the grenade will explode in you hands. This can be very uncomfortable.