I was just down another internet rabbit hole and happened upon a site that sells expert level Lego sets. This one of the Titanic has nearly 10,000 pieces for a mere $679. Both my sons loved Legos when they were little guys. I wonder how they'd like the "expert" level kits. The Lego website has several expert level kits, including a Fiat 500 car and the Colosseum.
legos are very handy in laboratory settings... especially whenever one needs to set up a quick structure or conceptualize a prototype.