At around 8 months of age, babies can begin to have favourite colours. To test this theory, I set up a simple activity for Baobao to take part in. On a black background, I placed some different colour books and looked to see which ones she would choose.
At first, Baobao chose a red book. Red is a strong primary colour and is one of the first colours that children can see clearly.
After that she chose a blue book, another strong primary colour that is easy to see.
While I used the colour books, you could use other sets of toys, that although similar are different colours. For instance, I would use the her rainbow friends or the pegs from her hammer and peg set. The possibilities for customisation are endless.