Lego is great for building and creating. Its also good for a prank. Put a few pieces in someone’s shoe before they leave for school or work. Even better, make a chuck of it and put it in one of your parent’s pillows before they go to sleep.
When you’re home and everyone is in the lounge – pop to the kitchen and put the leek in the sink, then shout ‘Oh no, there is a leak in the kitchen sink! Come quickly.’