One of their favorite outdoor activities lately is to climb trees.
They usually always play in the dirt/mud while they are outside as well. Somehow Ethan manages to stay clean while Alayna usually gets filthy.
When they are indoors, a favorite activity is playing with Alayna's dollhouse. She plays with this nearly every single day. This was one of the best toys I have ever bought her. Lately she does not use dolls in her doll house, but rather all the tiny little toy dogs she has. She calls it her "dog house" :)