A note from Gr-Ma Duck:
It was so cute to see little duckie heads stretching over the top of the brooder box this morning when I went down to check on them.  Although they were very unhappy because they spilled the water everywhere then made a BIG wet mess in the brooder box and every little duckie was messy and unhappy about it.  They are now napping in the laundry basket.

It may be time for a larger brooder.  You can't really tell from the pictures posted this morning but they are getting big.