A master gardener offers suggestions on different kinds of garden containers.
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Soccer balls are always popular with kids. Create drainage by drilling holes in the bottom and cut out a planting hole at the top. This won't hold up past one season, so plant annuals in them. Marigolds are kid friendly because they're easy to grow and they're colorful. Top it off with marbles. They'll block out light and retain moisture just like any other mulch, but they're much more fun.