Composition 1

Love the colour palette here Lillian! An the textures go very well with the child-like theme

This looks so fun and playful! And I love the soft colour palette - it's playful but also gentle and comforting.

This is wonderful! I love the colour palette and the composition is really successful :)

I love the colours you have used - really fresh and vibrant. I like the different patterns/textures you have used here too.

WoW! It's even better with colour! I adore your colour choices and the squiggles on the bunk bed add a really lovely touch. I like how you've added some squiggle in the bottom corner too.

I second all that's been said above. I instantly feel this child's being raised in a happy, loving home.
A suggestion (both here and in the black and white project): the black title is dominating your page. I suggest grey. Image > Adjustments > brightnessContrast could be an easy way to get that. Or Hand lettering, like the word ELM below might be even better.
That said, kid's room happiness could be a more appropriate title!
The lower right corner is so nice that, enlarged, it could be a beautiful full page on its own!

I like the way the rippling and twisting patterns add movement to suggest the madness!

This is lovely! I really like your characters and your colour palette. Also a fan of the swirls in the furniture.