Twitter-icon.com has a great selection of twitter icons and buttons.
Site: mini-beasts.com (Minibeasts : Travelbugs Mobile Mini-beasts)
Travelbugs Mobile Mini-beasts will come to your school and conduct a workshop on the importance of 'mini-beasts' within the food web, ecosystems, agriculture, medicine, etc.
Do you have a twitter account? If so it's important
to get as many people as possible to follow you.
Great follow me icon captures attention of the visitors
and brings more followers to your twitter account.
Choose great twitter icon for you website!