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!!
"Kenan also cut a ton of natural wood blocks for the kids. They had a great time building fairy houses and structures and kingdoms and knocking them down again. Ours are really roughly cut (husband used a chain saw), we didn't sand them or seal them or anything. It is truly amazing to see their imaginations at work."