PBS
Pbs Kids: Plum Landing: Seed Racer
Help Plum collect all the different kinds of seeds before time runs out. Fun, interactive game shows how different seeds propagate. Look out for those crows!
Other
Little Giraffes: Insects
Insect activities for early elementary students are pictured and described on this resource.
National Pest Managment Association
Pest World for Kids: Crush That Bug
Click on at least three bugs in a row to remove them in this fast-paced, enjoyable game. There are six levels in all, and special tools you can use to get more points.