My recommendation is to give some samples to other educators/day care providers.
Educate them on the use of the sprays. Follow up a month later. If their experience has been positive, encourage those that have their own websites to give your product a "plug." Also, ask them for a testimonial that you can use on your own site.
You may also want to try Google Adwords. Google will allow you to target your product and set a budget that's low. For example, for my business - Sock Grams - I launched in April and started with Google with a $5.00 per day budget, knowing I could "suspend" my campaign if I was spending too much per month. -- Good news is, business took off and I was able to increase my daily ad budget. My guess is that you will, too!!!
What a great idea you have!!!
Wishing you lots of luck,
Heather