OSK COMMUNITY

These are on sale on Outdoor School Shop. Fleece lined and waterproof! $29 and you might be able to get an additional 15% off with the code OCEAN at checkout.

https://outdoorschoolshop.com/Muddy-Puddles-Puddleflex-Fleece-Lined-Rain-Trousers

If you want to splurge, OSS set up an Ocean State Kids Shop for us: http://outdoorschoolshop.com/schools/ocean-state-kids/