I know I have lots of toddler moms reading so I found some great indoor activities to keep your little ones busy!
Just do a search for winter sensory bin and you'll find LOTS of ideas. I thought this village from Happy Hooligans was fun!
A color scavenger hunt from The Artful Parent
A blow fish toy from Made by Joel
Jello excavation from Tinkerlab
No Time for Flashcards has a great little list of indoor gross motor activities
My boys just loved playing with new things that weren't toys. I made a cupboard just for them to get into and would put different things in it now and then. They loved exploring it while I was in the kitchen.