The Mermaid in the Mall Problem - The Mega Mall. When a furniture store becomes a magical forest, Peg and Cat must become Knights of the Round Table - if only they can find a round table! Primary Content: Working with flat shapes. Secondary Content: Solid shapes. The Painting Problem - Paris. To get purple paint for their masterpiece, famous painters Peg Casso and Vincent Van Goo (Cat) need a whole new kind of addition. Primary Content: Adding on to find sums to 5, identifying addition and equal signs. Secondary Content: Working with two dimensional shapes.