Lilacs - I would say this is one of the best smells in the world. I always stop and smell them when I get the chance.
Swinging - I pushed Q on the swing last week and did a few "under ducks" and he giggled and loved it all.
A cardboard box - we made use of some cardboard boxes last week to make knight's armour and swords.
Police officers (on horses!) - Toronto held the big Raptors Championship parade and the police did a great job of keeping everyone safe, generally and when things got a little scary with the shooting. Early in the morning when I was walking through Nathan Phillips Square, I saw a police officer and I said thanks for keeping us safe. Then I snapped this in the afternoon as I walked north on Yonge to find an open subway station.