It seems all we do these days in our house is dance to Mumford and Sons "I Will Wait" and Foster the People's "Helena Beat", which Isaac refers to as Sippa Sippa (related to one of the lyrics). It is pretty fun. Here's a clip of Sippa sippa dancing.
We've been going to the Please Touch Museum a lot since it's been cold and wet weather. Isaac is more interested in the grocery store now and Tyler loves the ship and planting potatoes.