Here is a great service for elementary teachers and students! Primary Wall! Simply create a URL address and elementary students can visit the wall to write note or message one another. Super kid-friendly and a great use for brainstorming sessions!
Of course, you will want to plan out exactly how you want to implement this in your classroom because students are definitely going to want to write silly notes on it. Clear planning will be the key to success! Here is a short video for you to watch!