Pushes and pulls
Forces and movement
Forces in action
Friction
Simple machines - Edhead
Simple machines - Harcourt
WOW simple machines
Magnets and springs
Sounds and hearing
Science Lab (Choose "Sound")
WOW sound

Plant Facts
The Biology of Plants
Life cycles
Variation
Life cycle of plants
Growing plants   
Helping plants grow well  
Parts of a Plant
Creature Features (animal information)
KidsGardening.com
WOW plants

Dirt Made My Lunch (song)
The Dirt on Soil
Rocks and Soil activity
The Rock Cycle
Rock Cycle Experiments
How sedimentary, metamorphic and igneous rocks are formed
How to identify minerals
Mineral gallery
Rock samples
Forces that Shape the Bay
Get Eroded
Fossil games
Fossil match

Cool Science for Curious Kids
Invention Playhouse
Science Fair Central
The Ultimate Science Fair Resource