I took my car to show the students at my old primary school. I had half an hour with each of three classes as part of their science curriculum. The children were exceedingly interested and very positive about electric cars. I did have some rough ideas about what I might tell them but they ended up asking so many great questions that they basically led the discussion. I took a short 502mm battery cable and a 150A 500V fuse to pass around, and I showed them a 10Ah LiFeBatt cell, an 18650 laptop cell and one of the Thunder Sky cells from my car. Before I went, I spent an afternoon cutting a polycarbonate cover to go over the battery -- I didn't want any small hands getting a shock.
If anyone is interested in starting something like B*E*S*T Outreach, get in touch, these students would be very keen.
Many thanks to those on the EVDL who gave advice on what to say.