I bought this for my puzzle-loving daughter (age 7, Year 3) and it kept her busy in the car on our journeys to visit relatives. It contains a good mixture of challenging puzzle types including word searches, crosswords, code-breaking, general knowledge quizzes, doodles, and maths problems. For some of the puzzles you need to know something about Moshi Monsters and Monstro City, so either be prepared to visit them online, or ensure your puzzler knows about the characters! I was required to assist with some of the puzzles (explaining instructions, or helping with mental arithmetic and spelling), so I suggest it would be suitable for any Moshi fans aged 7-11 (depending on ability).
There are lots of Moshi illustrations within the puzzles, but all the pages are printed in black & white.