What is the main age group this book is written for ?

My 10 year old daughter loves it and can use it independently. 8+ is the age recommendations on the box.

Is this set too difficult for a soon to be eight year old? He has lots of legos, and loves building with them.

An 8 year should be able to build with it. It does require a lot of your own Legos.

Does the lego classic medium creative brick box 10696 have everything i need to make all the machines?

I think you will need more. For example, the pop-up flag & falling hammer project uses 11 (2 of those included) 8x2's. One project also includes a 4 peg slope brick that I can't see in the picture of the brick box. For the pulley and bucket project, you'll need what looks like 28 4x2's (or pieces that add up to those).

It's kind of a trap, but more like build and play with lego. You build something with lego and put it together. Then you will see a chain reaction.

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⚙️ Unlock your inner engineer with every click and chain!

STEM POWERED FUN - Engage critical thinking and problem-solving skills with hands-on mechanical puzzles.
NO BATTERIES NEEDED - Pure mechanical magic—no charging, no downtime, just endless play.
LIMITLESS CREATIVITY - Build your machines in any sequence to engineer one-of-a-kind chain reactions.
33 PRECISION LEGO PIECES - Craft intricate moving machines with every piece designed for dynamic motion.
PERFECT FOR YOUNG INNOVATORS - Designed for ages 8-12, inspiring the next generation of engineers and creators.

KlutzLego Chain Reactions is a STEM-focused paperback kit featuring 33 multicolor Lego pieces that enable kids aged 8-12 to design and build moving machines. With no batteries required, users can create unique chain reactions by assembling machines in any order, fostering creativity and mechanical problem-solving.

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Product Dimensions	25.5 x 4.3 x 23.2 cm; 453.59 g
Manufacturer recommended age	8 - 12 years
Item model number	9780545703307
Original Release Date	2014
Educational Objective(s)	STEM
Language:	English
Number of Puzzle Pieces	1
Assembly Required	No
Batteries Required?	No
Batteries Included?	No
tech_spec_battery_description_toys	No batteries required
Material Type(s)	Plastic
Remote Control Included?	No
Color	Multicolor
Release date	15 February 2015
Language	English
ASIN	0545703301

Lego Chain Reactions by Pat Murphy - Paperback

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