I still need to get appropriate snow clothing for L (2 years old).

Which is better for a toddler to play in:
Snow bibs + snow coat
Snow pants + snow coat

I will have snow boots and appropriate mittens/hat, just not sure about bibs vs pants. She won't be outside for extremely long periods of time, just a half hour here and there at daycare to get the kids out of the house. I imagine lots of running in circles in the backyard, and probably trying to climb up and down the slide...

Thoughts?