Started by getting a 4 x 8 plywood sheet, mixed an outdoor paint with sanded grout in a color that looks like chalkboard because we couldn't find a chalkboard paint that is made for the outdoors. By the end of the weekend the board was in use. Got the recipe for the paint/grout mixture online and to our surprise it works great. Just like the real thing.
Outdoor play kitchen. This would be a great opportunity to practice transferring skills. Transferring water from jars to glasses or using spoons and bowls. It will be a perfect introduction to quantity and estimation as well as the notion of "0" (nothing), children love this kind of activities!!