This book is truly perfect for all ages! I bought it for my tween (10-14 yr old) niece and nephews but found myself reading the book all the time. I even had to buy another one for my coworker as a parting gift which was a big hit. Several other coworkers expressed interest in buying one for themselves! Absolutely love it :)

Great fun book for the younger set. Good to let them get a little crazy in this up-tight P C world!

My husband and I ran across this book when a friend bought it as a birthday gift for his brother (in his late 20s). We read through it and loved it! It has so many different ideas that are terribly immature, but why do we all need to grow up? Life needs to be fun.

We decided to buy it for our nephew who is turning 16. He'll get a kick out of it and have fun doing a bunch of the ideas in the book. I'm sure my husband will get him started and make sure he does a few things right away.

This is a great gift for anyone who is young and heart and has a great sense of humor! I'm also thinking about getting it for my brother on his next birthday (he'll be 34), but I'm not sure he needs it since he is immature enough.

I would have to say that this gift is best for the boys, but some girls might like it, too. I think it is funny, but not nearly as much as my husband. The girlfriend of our friend's brother hated the book, but she didn't have much of a sense of humor.

Strange look on daughters face when she opened it-but everyone had a blast trying some of the tricks. Favorite was the leg swinging clockwise trick. This is a book they will go back to again and again for more indepth fun. The perfect book for boy or girl that likes practical jokes, magic, science etc. This book will be loved for a long time.

This was a
Christmas present for a grandson. All of the kids spent all day pouring over it.

"How to create a fake leg" to stick out of your parents' car trunk when they drive away. The plans to the world's greatest paper airplane that my 7-year old son could follow. How to make photographs of tiny people. From practical jokes to practical necessities (how to whistle with your fingers, how to make unseemly noises with your armpits), this book provides literally hours of laughter-induced tears and entertainment. My wife found it with me in mind, but we soon realized what a perfect gift it was -- as, apparently, did the rest of the United States, as we found copies in extremely short supply. Kudos to the Klutz folks. This is a pure masterpiece of sophomoric humor -- and stuff you really need to know (like how to balance the saltshaker at an improbable tilt. Bravo!

I bought this book and another book edited by Klutz that was offered as a paired combo by Amazon for both my 13 yr old grandson and 16 yr old nephenw as a result of a book review in the New York Times. They have both commented to me that they are enjoying both books.

I bought this for my grandson, but found myself laughing out loud and trying different things in the book. Fun and creative. Great for tweens and teens.

Christmas present that Santa picked out. You can't get a much better recommendation than that. She liked it. She's a dork and loves corny jokes and tricks.

My 15, almost 16 year old son saw this book while holiday shopping. He wanted it, and reminded me frequently that he wanted it. I thought it would be silly, but when both he and his father BOTH loved the book upon our next shopping excursion, I knew it was a must have.
Several pediatricians over the years have told me that sibling interaction is very healthy, even if it seems negative to the parents. Kids learn positive and negative social interaction, learn their limits, and find out the consequences of going one step too far via sibling interaction. I must say this book fabulously guides such growth. Even I have to laugh if my son gets his younger sister to hold a paper cup of water against the ceiling with a broom stick. (OK, laughing stops if he doesn't clean up the consequences, but it's clean humor!)
I highly recommend this book. If the intended recipient is at an age to be offended by the title, give it to his/her parent & it's a safe bet the kids will pick it up & love it, and grow from it.

I wish I had known how to do some of the silly tricks and pranks in the "Encyclopedia of Immaturity" when I was growing up! Not only does it teach you how to do interesting skills like juggling, but you'll also learn foolish stuff like how to make your co-worker's mouse stop working, how to make all kinds of noises with parts of your body, paper fortune tellers, play creatively with your food and so on. It's a big book. The pictures and diagrams and the text are presented in a mock serious, deadpan style. The activities themselves can't be any funnier than their presentation.

I'm decades older than the target audience for the "Encyclopedia of Immaturity," and female, and most of these activities are aimed at boys -- at least boys are the ones I've seen doing these things over the years. But a younger brother received it for Christmas and I thumbed through it out of curiosity, and found myself rolling on the floor with laughter. Life is too short to be as serious and stodgy as I've always been. This fortysomething is going to get a copy for herself and try to have some harmless, giggly fun in the New Year!

This book is a lot of fun. I originally purchased it for my 6 year old son. It is filled with interesting/humorous facts, practical jokes, and fun activities.

We had so much fun with it that I bought 4 more copies and gave them friends and family.

They all like it so much that I ended up purchasing copies for my employees. I believe that everyone who has recieved this book from me has ended up buying at least one more copy to give to someone else.

The book is full of really funny and fun activities. Age ranges from 6 - 47 all really liked it. It is rare to find any product, let alone a book, that can be enjoyed by such a diverse group of people.

If you are looking for a fun (definitely immature) activity book I don't think that you can do any better than this.

Only one negative - they used a ring-binder. The pages get ripped out quite easily. Kids will mistakenly tear out the pages if they use it very often.