Cut each slice of bread into a large circle, using most of the slice. These will be used as the centers of the flowers.

Halve the grapes lengthwise to use as petals. For the mouth, quarter the cherry tomatoes lengthwise. Thinly slice the cucumber to form the eyes; the pupils will be sliced black olives.

Use some hummus to "glue" the pieces in place; serve any remaining ingredients on the side.