How can I keep raccoons from taking apart and damaging my pond lights?

I have a small pond in my woods about 90 square feet, 8 sq meters in area. Around the perimeter I have placed 6 – 8 small, solar powered lights that I buy for ~$1 each at the dollar store. They work great and last all night.
But, one by one they have been disappearing or have been damaged. If I lived in a neighborhood where there were kids I’d suspect vandalism but nobody is around here. I set up a trail camera and discovered raccoons are playing with the lights. They pull them out of the ground, wash them in the water, chew on them and finally dump the lights into the pond!
How can I discourage this activity?
I know I could shoot them but I don’t want to. That is a bit too severe a punishment for natural playful activity. And they are so damn cute!
What else can I do?
I recognize this is definitely a first world problem but it is frustrating to keep replacing them.
Any clever ideas?