How do you stimulate baby while still in the uterus?

The only way that I know is sound. Play music, in particular, classical. It helps to stimulate the area of the brain used for mathematics. Also, music heard in utero is recognised by babies after they are born (including birth time), they also recognise voices. Talking to your baby is another way to bond with your baby which helps brain development. Scientists have shown that bonding with children is an esential part of healthy brain development so chat away!