Most tinkering toddlers are introduced to legos at a young age. We first start with the big blocks, then move on to more complex shapes as we age. At some point in our childhood, we stop playing with legos and start writing papers (or blogs) instead. The brave souls who continue to make a professional career out of playing with legos are known today as engineers.
Fact: Most engineering colleges (yes including Colorado School of Mines) use legos in their senior design / Capstone courses. The late great Prof. Steele of CSM Robotics terms legos as 'prototyping tools'. Lego even has an advanced lineup of models that can be programmed via the computer.