Legolamania. (legomania)
Legolamania - A severe urge/tendency to engage in actions relating to Lego's.
A person who suffers legolamania is often referred to as a legolamaniac.
A person who suffers legolamania is often referred to as a legolamaniac.
Oh, he was such a nice boy, until he started playing with those blasted Lego's. He doesn't do anything else! I think he is suffering with Legolamania. (legomania)