Homemade pumpkin pie?

I have 3 pumpkins. 2 that I grew in my garden and one that my son got from a farm on a school field trip. Not sure what kind of pumpkins they are but I was wondering if I can make a pie out of the 3 that I have. The ones that I grew are called Jack O' Lantern pumpkin seeds that I got from walmart. Does anyone have a idea if I can make a pie or not? If so please let me know cause I want to make a homemade one...Thanks