How to Make a Volcano
How
to Make Slime
How to Make Soap
Flame Salts
(Other
Science Projects)
Removing Crayon
Marks
Cleaning Windows
(Cleaning Tips Index)
Use a high alkaline all purpose cleaner preferably one with ammonium hydroxide (Aqua Ammonia). With a all purpose-soaked cloth rub the marks away. Rinse and dry.