Simple child's bedtime prayer- any ideas?

[spiritofstlouis]

I'd like to add a prayer to my DS's bedtime routine (he's 9 months...)- it just needs to be a couple of lines long. I'm afraid I can't really think of anything other than God bless mummy, daddy etc. It would be lovely to find something he will find comforting as he gets older.

Thanks

dd's class say..
oh my god i give to you
all that i think and say and do
all my work and all my play
i have/will give to you today.