How to make ducks and ducklings which will float when they are placed in water.
Get one large cork and several small corks. Cut slits into both ends, with the help of a parent and a knife, as shown.
The cut out the heads and tails from thin cardboard and insert them into the slits. You can draw on them to make your duck more realistic.
Use two large tacks for feet. These will enable the ducks to stand and will also weigh them down and hold them right side up in the water.