Get concrete pavers at big box home store. Use Outdoor paints in red, purple orange, blue, green, yellow (whatever colors you like). The black was used to paint on the numbers and the black was to outline the numbers so they would "pop." You'll probably need more of the white than any other color. Would make a great "hop scotch" play area.
Back yard?? "Royal Empress Tree...grows 15-18 ft./year. Empress Tree Facts Grows up to 10 feet or more in the very First Season! We have seen some grow as high as 20 feet.Explodes with rich lavender flowers that look like Orchids but smell like Jasmine. Grows as far north as Canada and as far south as Mexico.
Vegetables You Can Grow in The Shade