Your child's understanding is growing rapidly. For instance, he no longer thinks crayons are something to eat. He can now grab them and create glorious scribble pictures just for you. He can play simple games, and will while away long moments playing peekaboo or naming body parts – where's your nose? Where's mummy's chin? His memory of events is also developing, so you may find that he will remember things that you have forgotten all about when you revisit a place.
He's still got some way to go before he's completely steady, however. It's easy for him to misjudge the depth of a stair or to trip over his own feet when running towards you for a hug. Make sure your first aid kit is prepared for plenty of cuts, bumps and grazes.