Your baby has now learnt to control his arm movements - he can hold a toy and look at it, and he will reach towards objects. His back is stronger and, when he is lying on his stomach, he can raise his head. He'll enjoy.....

Baby Gym
Dangle toys and objects over him so he can reach for them.

Rattles
For him to shake (try empty plastic bottles filled with dried beans).

Music
Play music and sing songs to him.

Soft Books
Especially those with different textures.

Playmats
With bright colours for him to explore.

Mirrors
So he can examine his own reflection.

Soft Ball
With a bell inside which he can squeeze.