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This font "DotPreschool" is donationware. 
You're free to use this font in personal use, non-comercial projects. 

But for any use in a commercial projects where you or a client benefit monetarily, we require you to make a donation. 

You can do this by making a payment to paypal account: chubix99@gmail.com at least $10 up to whatever you beleive fair. Once you've made a donation you can assume the right to use this font for all your following works.