First you build a tower from LEGO bricks. Then it magically appears in an iOS app and you defend the tower you built, brick-by-brick in the real world, from invaders in the virtual iOS world. Sign me up.
I recently got this awesome Classic Mac lego set from Chris McVeigh. There is a standing joke in my house. The kids get Lego, dad begs to help, dad gets denied. Not this time. The kit even includes a clever Lego logic board. I love having this on my desk