Stripie Snakie acts about 8 years old, and he and all other characters age by a year on August 22. He likes tractors and other vehicles, Fang, his pet rat, video games, pranks, and other cool reptiles.
Tangerinei is 10 or 11 years old, and she enjoys science, math, computers, gardening, and pretty much all animals and plants. She's actually very closely based off the Great Snake.
Sweet Grapevine is 10 or 11 years old. She's the main popular girl at Serpentville Elementary, but she's very nice and will let anybody be her friend. Her favorite pop star is Taylor Crotalis, and she really likes fashion, her friends, and her phone.
Caramel Apple is 10 or 11 years old, but she's very mature and is the closest thing to a parent the Little Pythons have. (The Little Pythons' species doesn't practice maternal care, so after laying their eggs, their mom left them behind. Luckily, she also left the credit card and was perfectly content to pay the bills.) She enjoys cooking, especially baking, and her current goal is to be on the cooking show Mastersnake Junior.
For the purposes of doing pictures with all 4 Pythons together, here's a collective reference with their names that shows them with stuff they like.