Decorate: Seat kids at small tables and chairs with floral paper goods. Set out plastic teapots and cups filled with juice.
Eat: Serve "tea sandwiches" (crusts cut off), mini-scones, and mini-cupcakes with sugar flowers.
Make: Paper flowers out of pipe cleaners and tissue paper. Give kids tiny flowerpots filled with jelly beans to "plant" their flowers (these become the favors).
Play: Classic games -- musical chairs or hide-and-seek in the garden.