Specifically targeted to children ages 5 and up, not to adults or hobbyists Lego kits come with instructions for building just a few models. Brick Books supplement the fun with hundreds of new ideas Easy-to-follow, step-by-step instructions take the guess work out of building Brick Books feature the most common parts found in Lego sets, so that kids who already have lots of Lego parts at home can still use the books Gender neutral (much of the competition seems targeted to b