What cookie comes in animal shapes and is sold in a box shaped like a circus wagon?

The animal-shaped cookie sold in a circus-wagon-style box is animal crackers.

Animal crackers are small, lightly sweet baked goods formed in the shapes of creatures such as lions, bears, elephants, and tigers. In American English they are usually called cookies, although their layered dough and mildly crisp texture resemble crackers. The clue specifically points to Barnum's Animals Crackers, whose package was designed to look like a circus wagon.

The circus-themed product was introduced in 1902 by the National Biscuit Company, now Nabisco. Its small carton included a string so it could be hung from a Christmas tree, and the printed wheels helped make the package resemble a wagon. The product became strongly associated with P. T. Barnum's circus imagery, although Nabisco did not need to license the circus name.

Animal crackers are not the same as frosted circus animal cookies, which are colorful, sweeter, and often covered with icing and sprinkles. In 2018, Barnum's packaging was redesigned to show the animals outside the box, reflecting changing attitudes toward circus animal displays.