When I taught a lesson last week I realised I'd completely forgotten one of the sentences for remembering bass notes :S I use Grizzly Bears Don't Fear Anything for the lines and All Cows Eat Grass for the spaces in the bass clef.
Scream, glad M loves the keyboard! Keep at the same tune and you'll play it at a more normal speed soon. Does it have the chord symbols? If so when you've mastered the RH you can always play just the bass note from the chord - or use autochord if your keyboard has it!
Pet, I balance Iz on one leg - sitting with one leg either side - and pedal with the other if need be. I used to stick to pieces where my hands were quite close together so I could support her with my arms, but she doesn't need that anymore. She's also been doing it for a long time - there's a pic of her at about a month old on my Facebook on my lap (asleep!), and I definitely did it before that - and it's something I do almost every day, so she's very used to it! That makes it sound like I'm a very dedicated pianist - I mainly end up playing nursery rhymes and songs she likes me singing along to or playing!
My husband and I often go through the sheet music from musicals (we don't have the Phantom book sadly, though I've got various pieces in compliations!) - he'll sing and hold Iz and I'll play. Last time we did it, she fell asleep to me playing Fauré in the morning, and then fell asleep while we were singing The Song That Goes Like This from Spamalot as a duet. If anyone knows that song, they'll know it's not particularly sleep inducing...! Daft baby :)
She often just sits there, looks up and smiles or gets excited when I start, but after a while she gets bored and then wants to play herself (hence today's picture). Alternatively, I play something with hands quite far apart or move the melody up an octave so she can play some clustery chords in the middle :)
I ran a choir rehearsal for about 1h20 mins today. Knackered. Seriously, how do people work with a baby tiring them out?! Early to bed methinks..