Add some food coloring to corn syrup and you have a very sweet glue mixture!
I took these photos at a local school I visited and noticed the blue bottle of corn syrup (made by adding food coloring).
The children painted a little fish bowl cut out with the blue corn syrup.
Then they added little construction paper fish on top of the corn syrup.
Next they sprinkled on a few little beans to make the gravel in the bottom of the fish tank.
Then set it aside to dry!  The blue corn syrup will dry like glue and stay blue!
It takes a little more time for the corn syrup to dry so be prepared to set the finished projects aside overnight.