The weather is great, so fitness is easy to fit in now!
GO OUTSIDE! and PLAY WITH THE KIDS!
Run around with the kids, and I mean literally run! Try hide-and-seek, chase, running bases.
Go for a family bike ride.
Take a walk! I live close enough to downtown to be able to make a healthy walk out of it and the kids can handle it too. We can also stop at two parks along the way.
Play at the playground! Climb, do the monkey bars, do some push ups!