DDs 1 and 2 have birthdays which are very likely to fall within the lockdown. Usually we go camping, and this is obviously not going to happen. So I'm going to make them cakes of their choice. DD2 has requested a 'rainbow bee' (She's 2 and adores bees) but my food colouring is always a bit lack-luster.
So, which food colourings have you used which are really bright and vibrant? Any tips? It'll be buttercream icing because that's her favourite.