Absolutely amazing way to waste time while on vacation or at work on a slow night.  You pretty much need to have a straight edge to connect half the dots.  The dots are super small so they're really hard to see.  If you have bad eyesight I wouldn't recommend these.  They should be good for kids over the age of 10.  I liked this book so much and it was so fun to do the puzzles that I bought other books by the same makers.