Midge/insect repellent for babies and toddlers - preferably not too chemically

[mcmudda]

It's midge season here and because we live on the shores of a loch it's hell outside and the garden is unuseable

I can use the miracle cure that is Avon Skin-So-Soft, but I'm not sure what's suitable for a 12 mth and 3 yr old.

Boots have some fairly natural sprays I think.