We want to make DS laugh! He's 9 months and has been laughing since about 3 months but proper bellylaughs are few and far between - he grins a lot instead. He seems to become jaded at things - he likes peekaboo and it made him laugh at first, now he just smiles - and yesterday he laughed his head off at the cat leaping at a cat toy, but having seen it again today he's a bit "yeah whatever".
Cue me and DP leaping around like loons, puttin gobjects on our heads, making daft noises etc. and DS just giving us indulgent smiles. We never know what will really set him off. So please tell me what makes your baby laugh?