"Play with LEGO's together as a family with these family LEGO activities." - it's an activity guide put out by Lego and has some fun ideas of how to have the entire family play with Legos together. I'm pinning it as a possible FHE game.
Because we have no shortage of legos/megablocks. This round of up 30 educational LEGO learning activities shows that there are LOTS of different ways to use Legos for math, reading, language arts, history, science and more!