Not having played Super Mario Bros. as a kid, I can't fully appreciate this homemade "dollhouse" (Bowser who?), but maybe your kids will (and you dads).
Cia of DeerDot made this 4-level Super Mario house for her young son and even without understanding the references, I can tell it's awesome. Jenny of Dos Family was visiting them and, thankfully, took pictures of each level for you to check out. Find them at Dos Family.
(Image: Jenny Brandt/Dos Family)

Nomade Express Slee...
i've got 3 boys and a husband who works for nintendo, so we're very well acquainted with all things mario in our house. this is fantastic! my boys (all 4 of them!) would love it!!
Why would moms not get a kick out of it? Plenty of moms played Donkey Kong back in the day, and that's where the brothers started. Super Mario Brothers and Super Mario Galaxy games are platformers for girls and boys.
What about the moms? I loved Nintendo!