The first children's book series to place HVACR and skilled trades at the center of STEM education, written by a licensed HVACR contractor, certified educator, and workforce development advocate for young readers ages 7–14. Five books available now on Amazon, with more coming soon.
Tommy & Theo follows two curious young characters as Tommy, a future engineer and creative problem-solver, teams up with Theo, his talking thermostat, to explore the exciting world of heating, ventilation, air conditioning, and refrigeration systems around them.
Written by Oneil Fuller — Certified Master HVACR Educator, Licensed HVACR Contractor (TX & GA), Children's STEM Author, Curriculum Designer, and Workforce Development Advocate — each book in the series blends real technical concepts with age-appropriate storytelling that makes skilled trades visible, exciting, and attainable.
These aren't just books. They're career catalysts, planting seeds of curiosity that grow into pathways.
Each Tommy & Theo book is designed around measurable STEM learning outcomes, helping students connect everyday comfort at home and school to real-world technical careers and skilled trades pathways.
Students learn how heating, cooling, airflow, thermostats, and ventilation systems work through simple stories, illustrations, and everyday comfort problems.
Each adventure encourages curiosity, observation, critical thinking, and troubleshooting as Tommy and Theo solve HVACR mysteries together.
The books introduce HVACR as a real career pathway and help students see the skilled trades as smart, valuable, and future-focused.
Students are introduced to energy efficiency, clean air, refrigerants, heating and cooling performance, and how HVACR connects to the environment.
Concepts like temperature, airflow, pressure, equipment operation, and system performance are connected to practical, real-world applications.
The series helps every child see that they belong in STEM and skilled trades, regardless of background, learning style, or career interest.
Five books available now on Amazon — each focusing on a different aspect of HVACR and building a complete educational library for young readers ages 7–14.
Tommy discovers that his thermostat, Theo, can talk. Together, they begin an exciting STEM adventure that introduces kids to home comfort, thermostats, heating, cooling, and how HVACR systems help families stay safe and comfortable.
Tommy and Theo solve clues around the home to understand how temperature, airflow, and clean air all work together to create a comfortable indoor environment — connecting HVACR concepts to everyday life through mystery, discovery, and STEM thinking.
Tommy and Theo explore the hidden world inside the air ducts, learning how air moves through a building and why airflow matters for comfort, efficiency, and indoor air quality — introducing students to ventilation, duct systems, filters, and proper airflow.
Tommy takes a journey inside a home's heating system with Theo as his guide. Students learn about furnaces, heat exchangers, blower fans, safety sensors, and how heating systems keep homes warm during cold weather.
Tommy teams up with Theo for a cooling adventure that helps students understand air conditioning, cooling equipment, airflow, and how HVACR systems remove heat to keep indoor spaces comfortable.
Tommy joins the Comfort Crew for a fun HVAC Boot Camp experience where students learn teamwork, tools, system basics, and how skilled trades connect to real career opportunities.
This book expands the Tommy & Theo world into a kid-friendly HVACR boot camp experience, helping students explore skilled trades through teamwork, problem-solving, and hands-on discovery.
There are three ways to get Tommy & Theo books into students' hands.
Fund books for entire classrooms or schools through our campaign sponsorship tiers.
Sponsor NowSchedule a school visit — books are distributed free to students as part of every visit.
Request a VisitMake a general donation — $25 funds one student's book. Every dollar is tracked.
Donate NowA book today could be a career tomorrow. Sponsor, donate, or bring Tommy & Theo to your community.
