My son turned 5 recently, and my husband made this lovely train cake for him. I thought it would be fun to use the food colouring in glass tumblers and buy simple white flowers to go in them. I guess this can double as a bit of a science experiment too, if you have flowers like daisies. These flowers — I think they are sweet peas; does anyone know? — don’t draw up the colour so it’s just for decoration. They are bright and happy the kids loved it…so did I. Just another idea up the sleeve for bringing a little colour and happiness into the home.