We planted eggplant, bell pepper, and cucumbers in the sandbox. E is especially proud of the eggplant, and she regularly says "Look at my eggplant!"
In addition to planting in the old sandbox, we also planted in 3 earthboxes...grape tomatoes, tomatoes, and squash.
We have several other containers, and we have also planted sweet potatoes, onions, and carrots. We planted lots of marigolds to put around our tomato plants as natural pest deterrents. O loves arranging the marigolds around in the garden, and they both like pinching the suckers from the tomato plants. O is convinced that we are not going to have to go to the grocery store anymore, and she's pretty excited about that!