Giant Tepee Garden - creative idea for repurposing branches and natural materials & provide an amazing play space for kids. They can watch climbing beans grow up as a natural shade cover, plant other edibles in the planter box around the edge.
Make a Planting Calendar. Track what to plant each month with a simple ribbon organizer. Each ribbon represents a different month; use clothespins to attach seed packets that need planting during the month.
Do gorgeous fairy garden--Stepping stones with children's hands or foot prints is a nice way of allowing your kids to feel involved and leave their own mark on your garden as well as providing a small snapshot in time for you to remember and enjoy.