Check out the Baby Gifts category on www.giveagift.ie.
There you will find some great baby presents which will stimulate many of baby's senses:
Touch - different textures, shapes and movement
Sight - attractive and varied colours to engage baby's visual attention
Sound - shake and move the rattle to see if they can follow the sound
There are also some great baby books with engaging shapes and pop-ups to help them get into the story with more than their ears.