In a bowl mix flour, salt and warm water. Knead well for 10 minutes.
If dough is too dry add a little water.
With the help of a rolling pin, roll the dough into desired thickness.
Now with the help of large cookie cutter or jar cap, cut into the desired shape (round, heart etc).
Now place your child's hand into the salt ornament.
Make a hole with the help of a straw.
Bake for 1-2 hour at 250 degree F. If the ornament is still soft bake for another hour.
Once cool, paint and decorate as you wish with glitter, glue etc.
Finish with mod podge (optional).