Let's make this birthday one to remember.

78 years old (Born on December 02, 1946)

Happy Birthday, David Macaulay! May your day be as structurally sound and ingeniously designed as the architectural wonders you've brought to life in "Cathedral," "Castle," and of course, everyone's favorite—"The Way Things Work." Your knack for turning complex engineering into delightful adventures has built bridges (literally!) between generations.

From intricate illustrations that make aqueducts exciting to whimsical explanations making pulleys playful—you've inspired countless young minds. Here's hoping this year brings you even more success than a perfectly balanced cantilever bridge—and fewer mishaps than an overly ambitious trebuchet experiment!

Cheers to another timeless chapter filled with creativity, laughter, and endless curiosity!