This idea totally requires NO skill whatsoever:
Ingredients: glass outer vase; smaller glass insert vase, flowers, candy corn for Halloween. Period.
Put water into the insert vase, cover top with aluminum foil. Place inside larger vase. Pour candy corn between the two vases (aluminum foil keeps candy from falling into the water. Trust me.) Put flowers into insert vase after you remove the aluminum foil. Easy peasy.
Here is another version, using a Mason jar and a twine bow:
For Thanksgiving, use cranberries instead of candy corn.
For Christmas, use peppermint candy.
Keep husband and children away from the goodies at all times. Good luck with that!