I like the silliness. This is a really fun series with an unusual concept and likeable bumbling time travellers. I'm over-qualified for the stories for YA and kids, but I read them anyway. This author writes extremely well and makes me laugh. This has creativity, action, and futuristic technology that malfunctions frequently. The main characters are mostly believable, with some exaggeration, which makes a point in an amusing way. I am planning to read the rest of the series to find out what happens next.
I read this book to verify it would be fitting for my oldest nephew. While he may need to grow into the book a little (i.e. start by reading it with a parent), it should be a good series for him. There are lots of onomatopoeias for sound effects, although the "futuristic" (i.e. made up) words may be a bit difficult to grasp. All-in-all, a decent book.