Lay a large dark serving board or tray on a flat surface.
Place the two hard-boiled eggs side by side at the top of the board for the skull. Press one black olive half onto each egg for eye sockets.
Arrange two halved celery sticks vertically below the skull as the spine.
Lay the broccoli florets in two rows along either side of the spine to form the ribcage.
Place the radish halves just below the ribcage to suggest the pelvis.
Arrange baby carrots in two columns on each side as arms and legs, using 5 carrots per limb.
Tuck cauliflower florets at the elbows, shoulders and knee joints.
Place a small bowl of hummus near the hip area of the skeleton. Serve immediately or refrigerate loosely covered for up to 2 hours.