Materials:
- Twenty eight old pennies
- Four containers
- Water
- Lemon
- White vinegar
- Salt
- Hand soap
- Measure cup
Procedure:
1. Separate the 28 pennies in 4 groups (7 each)
2. Fill up the four containers with each ingredient (50 ml per container)
3. Insert the group of pennies in each container
4. Leave them for an hour and a half
5. Take out the pennies from the containers
6. Dry them
- Twenty eight old pennies
- Four containers
- Water
- Lemon
- White vinegar
- Salt
- Hand soap
- Measure cup
Procedure:
1. Separate the 28 pennies in 4 groups (7 each)
2. Fill up the four containers with each ingredient (50 ml per container)
3. Insert the group of pennies in each container
4. Leave them for an hour and a half
5. Take out the pennies from the containers
6. Dry them