dictionary

Mischief: 

1. wayward but not malicious behavior, usually of children, that causes trouble, irritation, or laughter.

2. a playful inclination to behave in this way or to tease or disturb

3. a person, esp a child, who is mischievous. 

4. a source of trouble, difficulty, etc 

Double Trouble: (noun) a very troublesome thing or person/s

Drumset: 

1. stools and kitchen utensils used for making music aka noise often accompanied by loud laughter. 

2. a small child can be used in place of stool to emit noise when banged on with kitchen utensils, may also be accompanied by loud laughter or high pitched scream. < most effective performed in undies>

Laughter: 

1. a signal that trouble is immanent

2. a sign that a mess often involving food or bodily fluids is probable.

3. a magical sound no matter the outcome.

Bath Time:
1. peace, relaxation and happiness often short lived.
2. water, water, water, bubbles, water....everywhere
3. signal that bedtime is approaching.

and from the wise words of JK Rowling:

(and just as reliable as webster's) 

mischief managed!