Hello, dear pianists. I have a question for you

Last year I learnt Messiaen's piece Noel from Vingt Regards. My piano teacher suggested that I should learn another two of his pieces since next year it will be the 100th anniversary of Messiaen's birth and hopefully, I might have the opportunity to play at some concerts of his music. So I've started learning the piece he chose for me, which is Le baiser d'enfant Jesu.
But I need one more piece of Messiaen. I really enjoy listening to and playing his music, but I find it hard to choose one of his pieces because I can't really estimate the difficulty since I don't know them that well, really

So, are you familiar with any of his pieces that aren't much more difficult than Noel and Le baiser and that would actually sound good performed together?
Thanks a million!
Ajda.