I love this idea---- Herb Garden Idea - short of space? These fragrant herbs have been planted in between pavers as a mini kitchen garden between the house and and pool. Edible ground cover is a great space-saving idea + softens hard landscaping.
watering can fountain: even if you don't have a pump, it would be a fun activity for kids on a hot day. Use any watering can or even containers with holes punched (i. milk cartons, tin cans, pop bottles, etc.