Positive reinforcement - Put a cotton ball, marble, pom-pom, etc. in every time you catch your child being good. Do something special when it's full. This is exactly what I need instead of focusing on the bad.
Every child NEEDS to make a Snowglobe at least once in their life. And as we are "doing" tadpoles at the moment.. our Froggy Snowglobe is quite appropriate for us right now! Clearly.. make one based on the bits and pieces you have at home!