Topics include butterflies and entomology, geocaching, food chemistry, and waterfowl biology.

New Castle County 4-H is hosting the Fall Science Saturday Workshop Series for ages 8 to 12 in Newark.

Registration is required. For more information, call (302) 831-8965.

Here is the schedule:

Sept. 5 - “Project Butterfly WINGS,” entomology and habitat conservation, 9 a.m. to noon., at the New Castle County Cooperative Extension office, 461 Wyoming Road, Suite 131, in Newark. Cost: $10.

Explore butterfly habitat at the Cooperative Extension Learning Garden and become citizen scientists through online reporting of their findings. Participants will also be actively involved in saving monarchs by transplanting milkweeds take home and support their own monarch habitat.

Oct. 3 - “Treasure Hunt,” geocaching, 9 a.m. to noon, at White Clay Creek State Park, 880 New London Road, Newark. Cost: $10.

Learn the fundamentals of GPS units and geocaching. Then we will have a geocaching treasure hunt in which they use GPS units to find where “X marks the spot.” Finally, participants will have the opportunity to make and mark caches to use in their own scavenger hunt.

Nov. 7 - “Migrate With Us,” wetlands and waterfowl biology. Time and location to be announced. Cost: $10.

Learn about the importance of wetlands for waterfowl survival through hands-on indoor activities and an engaging field exercise. This workshop is recommended for individuals interested in the Junior Duck Stamp program.

Dec. 5 - “Be a Food Scientist,” food science and chemistry, 9 a.m. to noon, at the New Castle County Cooperative Extension office, 461 Wyoming Road, Suite 131, in Newark. Cost: $10.

Participants will experiment with making their own beverages, learn about sugar crystallization through candy-making, and conduct an experiment to extract the gluten from various types of flour.