Lightbulbs, Ideas, Solution royalty-free stock illustration. Free for use & download.

I am an educator and created these images while writing educational material for kids over years. Instead of selling these images, I share them here for Educational use by teachers and students. If you find many of these useful, and you can afford to, I will greatly appreciate any donation, even $1.00. TERMS: Please use responsibly. Please do not resell my images AS IS. NONE of the images may be used for political purposes or propaganda. Please report any inappropriate use.