You can explore the fresh water fish called Betta. This is a great starter fish to give your kids. This is a great fish to have with your friends and their kids. You can compare and share all the data . There ar many sites with great information on the Betas. You can seek out books at the Wilkes Public Library. You can visit PetSmart with your kids and get bettas. You might want a male betta because of his variety in color.
You can explore more on the world of Bettas at Petsmart, Go to : http://www.petsmart.com/ .
You can make a diary with your kids and write down observations and take pictures of your bettas. You can learn more and have fun as a family.