Links to some useful wildlife sites:
UK Moths: www.ukmoths.org.uk/
Bat Conservation Trust: www.bats.org.uk/
Butterfly Conservation: www.butterfly-conservation.org/
British Dragonfly Society: www.british-dragonflies.org.uk/
Wildlife and Wetlands Trust: www.wwt.org.uk/
British Trust for Ornithology: www.bto.org/
The Royal Society for the Protection of Birds: www.rspb.org.uk/
Atropos (Journal for Butterflies, moths and dragonflies): www.atropos.info/
Microscopy UK: www.microscopy-uk.org.uk/
Kids might like to take a look at this site about "Butterflies in your Playground" (with thanks to a young lady named Dakota for suggesting it!):
A useful link on getting your children involved in Birdwatching (thanks Caroline H):
(note: the above site includes links to products and sales outlets. Whileyphoto does not endorse these resources).
The above webpage is another one suggested by a site visitor. It is actually about Conservation, but includes some useful information and links that may be of interest.