Pumpkin pulp and seeds make a great sensory bin with plastic spiders and other Halloween creatures swimming inside. Fun things to do with ur kids shows how to make this timely sensory box.
Good for ages 2 and up.
http://funthingstodowithurkidz.blogspot.com/2013/09/pumpkin-goop.html
Green owl art hides plastic ghosts and bats in the pumpkin goop and seeds and has the kids find them within the pumpkin.
Get the instructions here:
http://greenowlart.blogspot.com/2013/10/halloween-sensory-play-pumpkin-treasure.html