From the back cover: "These 8 full color...planes...only need scissors, glue, paper clips, a penny and a few other inexpensive materials to get them off the ground."
The paper planes are printed on sturdy, heavy paper. Nice bright colors.
I would recommend this book for ages 10 and up.
They are not complicated to make, but a child would need to be able to cut the simple shapes carefully with the scissors, or they might need some help from an adult.