I made a batch of playdough for MD this week and added a little bit of black food color (to make it grey) and a whole lot of beach sand from our recent trip. Since he's been excited about making sandcastles I thought this was a great idea when I saw it on Counting Coconuts.
It is definately fun but I think I added to much sand because it's a little on the dry side. Still works though.
This is our quick mini castle.