Can we grow a pumpkin inside a pumpkin ??

Science
Can we grow a pumpkin inside a pumpkin?
When searching different kindergarten blogs we found a great experiment with pumpkins........

First we carved the top off the pumpkins.

Then we took the seeds and pulp out. 

Then we added soil and mixed it with the pulp and seeds.

Finally we watered them a little each day. 

 The children decided the seeds also needed sunshine and love to grow so, we put the pumpkins in Mrs. Abela and Ms. Calfus's window in the afternoon and evening everyday and of course lots of love. However, on Monday morning we discovered mold had grown inside the pumpkins so we had to put them in the schools recycle bins. 

When we showed the class and talked with them about what happened some of the children's responses were;

"I think we left it to long."
"Maybe too much water."
"Maybe we should of had it outside too."

We are planning on researching more to find out what we should do different and try again.