Xylocopa has a set of Alphabet blocks engraved with pictures of all the equipment and training a budding mad scientist will need:

A – Appendages | B – Bioengineering | C – Caffeine | D – Dirigible | E – Experiment | F – Freeze ray | G – Goggles | H – Henchmen | I – Invention | J – Jargon | K – Potassium | L – Laser | M – Maniacal | N – Nanotechnology | O – Organs | P – Peasants (with Pitchforks) | Q – Quantum physics | R – Robot | S – Self-experimentation | T – Tentacles | U – Underground Lair | V – Virus | W – Wrench | X – X-Ray | Y – You, the Mad Scientist of Tomorrow | Z – Zombies

Also:

…the blocks have a super-secret built in encryption function – if you rotate any block 180 degrees, it’ll encode to ROT13. If it’s good enough for Adobe Acrobat, it’s good enough for Mad Science!

-via BoingBoing