Try to microwave the hamster again after he's thawed out

Try to put something metal in the microwave

Clothe Laverne in the costume

Open the safe

Deflate Oozo

Destroy a cherry tree

Try to mix the red paint and the Booboo-B-Gone

Get a job

Squirt five different people with disappearing ink

Try to mix the decaf and caffeinated coffees

Cook the hamster in Maniac Mansion (Don't try this at home, kids!)

Try to swap the textbook with the stamp album