Dog ball puzzle with 300 pieces

Everyone knows it's pointless trying to herd a bunch of dogs, and this devilish puzzle is no different: each piece has a different shape. They don't fit together like normal puzzle pieces. We'll let you in on a little puzzle trick: assemble the practical frame first—that'll keep your dogs in check! The only question that remains is: Who will find the one cat?

The puzzle was designed by Léa Maupetit, a French illustrator who lives and works in Paris. Her clients include the New York Times and Möet Hennessy.