Let's get organized! These quick, easy and inexpensive ideas can transform a boring backyard into a fun and entertaining kids paradise! Get your backyard summer ready with these 5 fun DIY projects! To make your own "Kinetic Sand" for an outdoor Mud Pie Kitchen, mix: 50 lb. bag of sand: $3.69 6 cups Cornstarch – about half the container you see above comes out to less than $2.00 per recipe Dishsoap – I only needed a few tablespoons, and you can usually get this free/cheap with coupons Water Check