If you have an inflatable pool, take it out and fill it with the comfiest blankets and pillows you own! It is the perfect activity for night time to look up at the stars. Great for date nights or just hanging with the kids.
SCIENCE FOR CHILDREN-Having already done this, it was a great addition for sand and sensory for even toddlers. Developmentally appropriate for children of all ages depending on what is added. Will abs (How To Make Slime With Flour)
Top 21 Insanely Cool Crafts for Kids You Want to Try
DIY - Sharpie Coasters, ceramic tiles (free or very inexpensive at any home store center), rubbing alcohol added with a straw or eyedropper, (for the colors to mix) -- Great inexpensive gifts!(Diy Ideas For The Home)