Re: "a pain when using the pieces to create something new"
I remember purchasing my youngest son (a prolific Lego builder with an enormous collection of bricks - mainly purchased in job lots from car boot sales at knockdown prices) a book of lego designs for 'interesting things'. He thought it was great and carried on taking some of the designs and constructing increasingly bizarre electromechanical widgets that swung/crawled/shed dangerous lego bits arond his bedroom and the house in general. One of my best purchases (at retail costs) was a 'lego hoover'. It saved many a foot injury and the early introduction to the kids of creative anglo saxon.