Simple Machines (Children's Press); Welcome Books Books in Order
2 books by Lloyd G. Douglas. Reading level: Grade 1.7. Lower Grades (Ages 5–8).
Series books grow with readers — but that's also the trap. Most series start at one reading level and one content intensity and drift upward over the course of the run. Simple Machines (Children's Press); Welcome Books (2 books by Lloyd G. Douglas) lands at reading level Grade 1.7, with average content intensity 1/5. Intensity stays consistent across the series — a kid who can handle the first book can generally handle the rest.
The reading-order table below lists every book with per-volume reading level and intensity badges so you can spot any escalation before it catches your reader off guard. For a deeper dive into how we score text difficulty vs. emotional weight separately — and why series readers especially benefit from that split — see our methodology page.
Content Intensity Across the Series
ConsistentContent stays at a steady intensity level throughout the series.
Simple Machines (Children's Press); Welcome Books Reading Order
| # | Title | Reading Level | Content |
|---|---|---|---|
| 1 | What Is a Plane? (Welcome Books) Lloyd G. Douglas | Level 1-2 | Gentle |
| 2 | What Is a Wheel and Axle? (Welcome Books) Lloyd G. Douglas | Level 1-2 | Gentle |
All Simple Machines (Children's Press); Welcome Books Books
Questions about the Simple Machines (Children's Press); Welcome Books series
- What reading level is the Simple Machines (Children's Press); Welcome Books series?
- The Simple Machines (Children's Press); Welcome Books series by Lloyd G. Douglas is at a Grade 1.7 reading level (average Grade 1.7). Intended for Lower Grades (Ages 5–8). There are 2 books in the series.
- What order should I read the Simple Machines (Children's Press); Welcome Books books?
- The reading-order table above lists all 2 books with per-volume reading level and intensity ratings. Start with book 1 and read in publication order unless the table indicates a different recommended order for newer readers.
- What age is the Simple Machines (Children's Press); Welcome Books series appropriate for?
- The Simple Machines (Children's Press); Welcome Books series is recommended for Lower Grades (Ages 5–8). The average content intensity is 1/5. Check the intensity trajectory above to see whether content gets heavier across the series — if it does, sensitive readers may want to stop earlier in the run.