|This and more at sciencespot.net|
Interactive food web site here.
TURTLE CONSERVATION link.
This site provides an excellent lesson plan and printable cards. I've also has students use the cards to play "War", with each child putting down a card simultaneously and trying to tap the card representing their food before they get tapped!
Pond Wildlife with food web here.
Another food web here.
Another printable here.
15 minute video here.