You can buy 'egg replacer' at the supermarket. I have always used this in recipes when baking something for the kids to take to school if a child in their class has an egg allergy. It works really well and I've never had a problem, I have used it in bikkies before. I would use the egg replacer in a basic biscuit dough, the kids will love cutting out the shapes!

The egg replacer is a powder which you add water to then add to your recipe. I think it is an Orgran product and it's usually in the health food section of the supermarket.