Never underestimate the amount of fun you can have with two throw blankets!
First, they are great for snuggling up with the little ones.
But laid out on the floor, they are great for games.
Space them out and each kid has their own mat (if the floor is soft enough) for somersaults (we call it “Flip-A-Doodle”).
They can also hop between them.  
They also play games taking toys onto them.