Grow Big, Little Seed by Bec Nanayakkara and Sarah Capon

Exciting things were happening in Nina’s home. 
‘While we wait,’ said Mom, ‘let’s plant a seed and watch it grow.’  

When Nina plants a pumpkin seed, she imagines herself and a little sister playing in the leaves of a large pumpkin plant. Nina’s mom is pregnant and it seems that Nina’s dreams may soon come true. But despite Nina’s loving care, her seedling stops growing as her mother’s pregnancy ends early. 
 
As time goes by, her mom is pregnant again, and Nina finds the courage to plant another seed. This time, Nina’s seedling grows and grows, and her family embraces a joyful surprise with not one but two rainbow babies.

The perfect picture book to share with any growing family.