I bought it for my 11 year old son as he had long been a small magazine with points linking it often uses when he has trouble falling asleep ... Hospitalized for more than 2 weeks I wished him to buy another one to occupy his days LONG ... but found a home! So do not panic ... I put my nose in the "found-almost-everything" what Amazon and there, according to my research I came across this BooK. In reading the various comments I thought it would please him and it seems that I just mentioned! It has not yet started (as already launched in other occupations), but from the outset he forbids me to make one for him! And yet, believe me, it itches! ;-) The numbers are very small, but quite legible. A small indication is given at the bottom of the drawings are with numbers and letters ... in short, impeccable !!! Strongly that the points take shape that we can find the designs that are hiding there. I recommend it as a hobby-relaxation.