Tie the ring to a cuddly teddy bear and give it to her as a gift when you propose.
Tie the ring to a balloon (or a bunch of balloons). Give her wedding balloons to make her think.
Put the ring in a box of Cracker Jacks. so that when she looks for the prize, she finds the ring!
Try tying the ring to this cute little teddy bear and then write your proposal on the Hershey kiss wrapper that sticks out of the kiss!
Go to Build-A-Bear and either build a bear or other animal in a suit with a tie and all or like a princess bear and have the voice box say with your own voice, "*Their name* will you marry me?" Then have a little bag or box on the bear somewhere where the ring is.
Give her a toy, with the ring attached, that says exactly how you feel: An 'I Love You' teddy bear from the exclusive Vermont Teddy Bear collection.