No Piagetian question here: it's positively NOT from your nurturing, your child's obsession with trucks and machines. Feed your little boy's (or girl's!) fix-it DNA with this great Mechanics Jacket from Knuckleheads. It's black with logo patch at the back. Black cotton twill lined with red/black buffalo flannel. (Size guide: Small 6-12 months, Medium 12-24 months, Large 2- 4 years.) Last one.