The BBC have a lovely selection of KS1 Life Cycle material including: caterpillars, seasons, insects and dandelions. There are also some films clips put together for discussion.
Hams Hall Pond covers frogs and butterflies – a good resource, but it does involve some reading. However, it could be a great resource for the IWB where shared reading can take place.
At the EverySchool website, there is an electronic book about the life cycle of a butterfly, and an interactive exercise on a hatching chick. There are also drag and drop activities on the life of a frog and the sunflower life cycle. You will also find a video about caterpillars changing to butterflies and a set of photographs recording the caterpillar changes. In addition, the site hosts many more related interactive activities and at least one of them is fully printable.
– a site to learn the characteristics of insects.
– several plant drag and drop activities.
There are many printables on this First School Years page , covering much of the KS1 science with word searches, labelling and crosswords.
Primary Resources has a whole collection of activities based on Life processes
Finally, many excellent Whiteboard Resources can be found at whiteboardroom.org.uk.