Prayer or laughter time

We have been doing a reading and having prayers for a while and i always say to Abi close your eyes put your hands together. But until recently she hasn't, then a couple of weeks ago she did. She put her hands together and shut her eyes but not normally she screwed her face up and had them half shut. Now she looked so funny that Ste had to leave the room to laugh and i struggled to say prayers cause she looked so funny. Poor child was only doing what we wanted. Now does me wanting to laugh make me a bad mummy and a bad christian when it was prayer time or just normal. I'm sure God has a good laugh at the antics that go on in our house.