Emil and Margo. Volume 7. Time for Mischief!

Emil and Margo are royal children, so they must be wise, polite, reasonable, and behave well! Fun in the castle is only allowed with clean hands and ears and strictly in carefully ironed clothes...
Only when their monster friends come to visit can Emil and Margo finally have some real fun. They can go to the Monster Library, where politeness and rules are forbidden, indulge in a seven-layer burger at the "Monster Burger," and even visit a real Monster Warehouse, where everything in the world for chaos and disorder can be found.
After all, to be happy, you just need to find time for mischief!