yeah, Jayrod7 is right ^_^ Thats why I'm having them in my tank rather then Tetras. They are more colorful and as long as you get about four males and three females. You should have fry in no time just for the kids to watch, but be careful when they get older. It can become overcrowding if the adults manage to leave most of the babies survive in the plants you choose to buy them. Heres some photos of mind if you want to show the kiddies some Guppies called "Reticulated Snakeskins and Mosiacs =3! I know I was raised in a guppy inhabbitens, it's the best fishie but doesint do well if you end up getting a betta in the future or another school of fish* learned from some HARD expeariance...*
They have alot of small problems and dont take much research compaired to other fish, just watch for parasites,ick, fin rot, Depression and them attacking eachother ,if you have all sorts of colored males though, they will build their own higherarcy with barly any tail biteing, just be sure to get at lease three different kinds of guppies.
Reticulated Yellow/Albino Snakskin mail and Reticulated Mosiac female>
Dispersed Reticulated Mosiac male>
Delta Lepord printed Female>
It's also a good way to teach your children about life itself by watching the babies that survive grow up, mait,spaw, and continue another generation while showing them the differents between male and female fishies. Like male and female humans =D I find it has a easier way in the future to use fish and fish insted nof birds and the bees to teach kids this matter XD But it's your choice really. They will learn on their own if you get guppies on how life regrows and faids for new ones to frolic.